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  2. 2010
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Questions Asked on
November 14, 2010

  1. AP Chemistry

    A bottle of wine contains 12.5% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality.

    asked by Anonymous

  2. chem

    Citric acid, the compound responsible for the sour taste of lemons, has the following elemental composition: C, 37.51%; H, 4.20%; O, 58.29%. Calculate the empirical formula of citric acid. (Type your answer using the format CO2 for CO2.) thanks

    asked by hannah

  3. Chemisry

    Write a balanced equation using the correct formulas and include conditions (s,l,g or aq) for each of the following reactions. 1)Carbon monoxide gas reacts oxygen gas to produce carbon dioxide gas. Express your answer as a chemical equation. Identify all

    asked by TMV

  5. Chemistry

    given the ionic formula X2O What is the charge of X?

    asked by HelloHello

  6. business math

    Of the 4800 students at Medium Suburban College (MSC), 50 play collegiate soccer, 60 play collegiate lacrosse, and 96 play collegiate football. Only 6 students play both collegiate soccer and lacrosse, 6 play collegiate soccer and football, and 16 play

    asked by liz c

  7. AP Chemistry

    What is the equation for the standard enthalpy of formation for magnesium nitrate?

    asked by Andrew

  8. physics

    A boat floating in fresh water displaces water weighing 35.6 kN. (a) What is the weight of the water this boat displaces when floating in salt water of density 1.10 x 10^3 kg/m^3? (b) What is the difference between the volume of fresh water displaced and

    asked by Meghan

  10. Calculus

    Oil is leaking out of a ruptured tanker at a rate of r = 19e^(2t) gallons per hour. Write a definite integral that represents the total quantity of oil which leaks out of the tanker in the first 3 hours. Using your formula answer the following questions:

    asked by Lena

  11. chem

    A 2.241 g sample of nickel reacts with oxygen to form 2.852 g of the metal oxide. Calculate the empirical formula of the oxide. Give the number of moles of each element to support you answer.

    asked by sam

  12. algebra

    If there are 8 red disks numbered 1 through 8, and 6 yellow disks numbered 9 through 14 placed in a box. Find the probability of selecting a red disk numbered 3.

    asked by Kelly

  13. projectile motion

    You have a boat with a motor that propels it at vboat = 4.5 m/s relative to the water. You point it directly across the river and find that when you reach the other side, you have traveled a total distance of 27 m (indicated by the dotted line in the

    asked by leila

  15. Physics

    A long wire that carries a current is bent into a solenoid with upward current in the front looking. If the observer could "see" the magnetic field inside this arrangement of solenoid from the right side, how would it appear? a) The observer would "see" a

    asked by Blake

  16. Chemistry

    A sample of oxygen is collected over water at 22°C and 762 torr. What is the partial pressure of the dry oxygen? The vapor pressure of water at 22°C is 19.8 torr.

    asked by Kiesha

  17. calculus

    Find all relative extrema and points of inflection of the function: f(x) = sin (x/2) 0 =< x =< 4pi =< is supposed to be less than or equal to. I can find the extrema, but the points of inflection has me stumped. The inflection point is (2pi,0) but

    asked by James

  18. Chem

    Can you please tell me if these are right? Classify the solutes in the following equations as a weak electrolyte, a strong electrolyte of a non electrolyte in water. a. XY2(s)=X2+(aq) +2Y-(aq) b. HX(g) ß=H+(aq) + X-(aq) c. XYZ(s)=XYZ(aq) d. YOH(s)=Y+(aq)

    asked by Jason

  20. Microeconomics

    1.You plan a major adventure trip for the summer. You won’t be able to take your usual summer job that pays $6,000, and you won’t be able to live at home for free. The cost of your travel on the trip will be $3,000, film and videotape will cost you

    asked by yt

  21. math

    Write a proportion that can be used to find the cost of 10 notebooks if 3 notebooks cost $1.98

    asked by Lilly

  22. math

    video games are on sale for 35% off. if a particular game regulary sells for $99.50 what is the sale price

    asked by Lilly

  23. physics

    an object displaces 2.3×〖10〗^(-3) m^3 of water when totally immersed into it. What is the buoyant force exerted by water? What is the density of the object if its mass is 26kg?of what material is the object made of?

    asked by fae

  25. Algebra

    You are buying beads and string to make a necklace. The string costs $1.50, a package of 10 decorative beads costs $.50, and a package of 25 plain beads costs $.75. You can spend only $7.00 and you need 150 beads. How many packages of each type of bead

    asked by Alissa

  26. chem

    consider the following balance chemical equation: 2NH3(g)+3CuO(s)=N2(g)+3Cu(s)+3H2O(g) if 18.1grams of ammonia reacts with 90.4 grams of copper(II) oxide, which is the limitting reagent?? what is the theorectical yield of nitrogen gasd? if 8.52 g of N2 are

    asked by julia

  27. Chemistry

    Write a balanced equation using the correct formulas and include conditions (s,l,g or aq) for each of the following reactions. 1)Carbon monoxide gas reacts oxygen gas to produce carbon dioxide gas. Express your answer as a chemical equation. Identify all

    asked by TMV

  28. math

    Tell which real number corresponds to the situation: During a month, a person withdraws $350. what is the corresponding # for this sentence?

    asked by charlie

  30. Maths

    What is 8.2% as a fraction in it's lowest term Please someone kindly help!

    asked by Milly

  31. math

    find the percent of decrease from 280 to 210. round to the nearest tenth of percent if necessary

    asked by Lilly

  32. Pre-Calculus

    If sin(theta)=15/17 and cos(beta)=(-5/13 (both theta and beta are in quadrant II) find tan(theta+beta)

    asked by Riley

  33. Chem

    Can you please tell me if these are right? A gas has a volume of 2.8 L at a temperature of 27 degrees C. What temperature degrees C is needed to expand the volume to 15 L? (P and n are constant.) I got 1334 degress C Combined gas law problem a balloon is

    asked by Alice

  35. math

    Two us states are not part of the contential us. What percent of the fiffty us states are included in the contential state? A.2% B 13% C.48% D 96% is it D?

    asked by Lilly

  36. Physics

    A diver running 1.2 m/s dives out horizontally from the edge of a vertical cliff and reaches the water below 3.1 s later. How high was the cliff and how far from its base did the diver hit the water?

    asked by Al

  37. math

    Suppose two blocks of ice are heading toward each other. block A has a mass of 4.24 kg and is traveling at 2.24 m/s. Block B has a mass 4.42 kg and is traveling at 2.24 in the opposite direction. After the collision they are traveling in the same speed.

    asked by Mayte

  38. Epidemiology

    what was the primary exposure variable of interest for alcohol consumption and risk of pheripheral arterial disease

    asked by Cindy

  40. physics

    A juggler throws a ball from height of 0.950 m with a vertical velocity of +5.50 m/s and misses it on the way down. What is its velocity when it hits the ground?

    asked by leila

  41. Math

    About 3/4 of the track team are girls. About 3/4 of these girls are in 8 th grade. What fraction of th e students are grade 8 girls? 1/3?

    asked by Tanner

  42. english

    Make a noun by adding a suffix to the word priest. write a sentence.

    asked by aj

  43. Physics

    A long straight horizontal segment of wire with 0.060 m traverses a west magnetic field with 2.0 T. If a south current with 4.0 A flows through the wire, which one of the following statements concerning the effect of the magnetic force on the wire is true.

    asked by Katie

  45. chemistry

    Calculate the mass of salts needed for constructing a buffer using potassium monobasic phosphate and potassium dibasic phosphate with the total concentration of 100 mM. The solution is to be prepared in DI water and the pKa value for potassium monobasic

    asked by dave

  46. finance

    Julie's x-ray company paid $2.00 per share in common stock dividends last year. The company's policy is to allow its divident to grow at 5 percent for 4 years and then the rate of growth changes to 3 percnet per year from year 5 on. What is the value of

    asked by will smithe

  47. geometry

    Two parallel chords lie on opposite sides of the centre of a circle of radius 13cm.their lengths are 10cm and 24cm.what is the distance between the chords?

    asked by Justice

  48. AP Physics

    Jean, who likes physics experiments, dangles her watch from a thin piece of string while the jetliner she is in takes off from Dulles Airport (Fig. 4-55). She notices that the string makes an angle of 24° with respect to the vertical while the aircraft

    asked by maddy

  50. math homework

    marty has saved $72 he spent $8 on a vid rental write a ratio as a fraction in simplest form to represent what proportion of his savings he has left

    asked by doo

  51. Business math

    what the rebate of the finance charge and payoff would be if the pickup truck loan were paid off after 27 months instead of 60. Total of monthly payments 60 x 194.38. I don't know how to get the total finance charge

    asked by Rebecca

  52. A&P

    Compare ionic, covalent, and hydrogen bonding, and fully describe an example of each. Is this right and I need help with an example of a covalent bond. Ionic bond is formed from one metal and one non metal. It is a solid at room temperate. In an ionic bond

    asked by Danielle

  53. physics

    (a) What is the torque about the origin on a jar of jalapeno peppers located at coordinates (1.0 m, -4.0 m, 2.0 m) due to force F1 = (-3.0 N) + (2.0 N) + (-5.0 N) ?

    asked by Gustavo

  55. Stout

    A chocolate chip cookie contains about 200 kcal. How many kilowatt-hours of energy per day does it contain. How long could you light a 100-W light bulb with the energy from the cookie?

    asked by Linda

  56. physics

    Do beams of charged particles contain isotopes ?

    asked by Reema

  57. 9th grade

    a stone propelled from a catapult with a speed of 50m/s attains a height of 100m calculate the angle of projection

    asked by Anonymous

  58. Satistics

    In North American, female adult heights are approximately normal with a mean of 65 inches and a standard deviation of 3.5 inches. a.) If one female is selected at Random, what is the probablility that shes has a height 70 inches or higher? b.) The heights

    asked by Benjamin

  60. Calc

    What is the area that this encloses? r = 4cos(3θ)

    asked by Thomas

  61. Math

    A map shows the distance between a corner of Cactus Road and 1st street and the corner of 1st street snd Merle oad as 3 inches. If the scale is 1 in: 3.7 mi what is the actual distance????

    asked by Edith

  62. math

    A building cast a shadow 42m long. At the same time, the shadow cast by a 34 cm tall pole is 86 cm long. Find the height of the building

    asked by Ray

  63. math

    The trough is in the shape of a triangular prism. It is 5 ft long and its vertical cross sections are isosceles triangles with base 2ft and height 3ft. Water is being siphoned out of the trough at the rate of 2 cubic feet per minute. At any... time t, let

    asked by LOKAA

  65. chemistry

    I have the lewis structure for ICL3 and SF4, it is asking for the general formula for ICL3? Is this the empirical formula if so how would I figure out how to do that

    asked by Sarah

  66. high school

    In F. Scott Fitzgerald's story "Bernice Bobs Her Hair," we are very likely to

    asked by Anonymous

  67. science

    what is the weight of a 48 kg astronaut in outer space traveling with constant velocity?

    asked by Jackie

  68. physics

    An amount of work equal to 3.5 J is required to compress the spring in a marble gun. If all energy is conserved, how much kinetic energy does a 25 gram marble have when it leaves the spring?

    asked by Mimi

  70. Chemistry

    Is crystallization a chemical or physical change?

    asked by Lucy X

  71. Algebra 2

    An appliance store manager is ordering chest and upright freezers. One chest freezer costs $250 and delivers a $40 profit. One upright freezer costs $400 and delivers a $60 profit. Based on previous sales, the manager expects to sell at least 100 freezers.

    asked by Maria

  72. physics

    How far downstream will a boat aimed 9 degrees upstream land? boat speed= 25m/s river speed= 20m/s river width= 20m/s

    asked by hi

  73. Chemistry

    How many pi bonds and sigma bonds are in ritalin. I counted 4 pi bonds(double bonds), and 18 sigma bonds(single bonds> I want to make sure I didn't miss count anything.

    asked by Kristy

  75. Chemistry

    How many pi bonds and sigma bonds are in ritalin. I counted 4 pi bonds(double bonds), and 18 sigma bonds(single bonds> I want to make sure I didn't miss count anything.

    asked by Kristy

  76. physics

    you measure the period of a 2.0m pendulum and find it is 2.8s. what is the value of g at your location?

    asked by hannah

  77. chemistry

    How many mL of 0.0500 M phosphoric acid (H3PO4) are needed to titrate completely 50.0 mL of 0.150 M barium hydroxide (Ba(OH)2)) solution?

    asked by steve

  78. chemistry

    the pressure on a gas at-73 Cis doubled, but its volume is held at constant. What will the final temperature be in degrees Cesius?

    asked by chelsey

  80. DISPLACEMENT and VELOCITY

    A turtle moves 3.5m [E] in 136 s and then moves 1.7m [W] in 88 s. a) What is the average speed of the turtle? b) What is the average velocity of the turtle? average speed: D/T = 3.5m + 1.7m = 5.2m/ 224s = 0.024m/s average velocity:?????????? Have I

    asked by Anonymous

  81. physiscs

    A 10g sample of an unknown ionic compound is dissolved, and the solution is treated with enough AgNO3 to precipitate all the chloride ion. If 30.1 g of AgCI are recovered, which of the following compound could be the unknown? A. NaCI B. NaNO3 C.BaCI2 D. Mg

    asked by Jay

  82. college intermediate algebra

    what is the step by step solution to 3x2y-11xy+8y

    asked by Shatovia

  83. AP Chem

    The heat of combustion of octane (C8H18) is 47.8 kJ/g and one gallon of C8H18 has a mass of 2620 g. If a car using octane is driven 10,000 miles in one year and gets 25 miles per gallon of octane, what is the total energy consumption? 1. 5.01 × 107 kJ 2.

    asked by Kai

  85. Physics

    Which of the following best describes the image from a thin convex lens that forms whenever the object is at a distance more than two focal lengths from the lens?

    asked by Laura

  86. Chemistry

    write the formula for hydrogen and bromine forming hydrogen bromide & nickel and oxygen forming nickel (II) oxide

    asked by alicia

  87. math

    In a survey, 480 people or 75% said they attened a movie at least a month. how many people were surveyed? i don't get how to find the answer

    asked by Lilly

  88. Physics

    A boy pushes his friend across a skating rink. Since the frictional forces are very small, the force exerted by the boy on his friend's back is the only significant forece acting on the friend in the horizontal direction. Is the change in kinetic energy of

    asked by Taylor

  90. HELP! advanced algebra

    A bakery is making whole-wheat bread and apple bran muffins. For each batch of bread they make $35 profit. For each batch of muffins they make $10 profit. The bread takes 4 hours to prepare and 1 hour to bake. The muffins take 0.5 hour to prepare and 0.5

    asked by Maria

  91. Physics homework help

    What approximate change in decibles does an observer experience form a sound source if the oberver moves to a new location that is 67% as far from the source? 23 -23 40 2.76 -2.76 1.94 -1.94 2.57 -2.57 0

    asked by kristina

  92. chem

    when an aqueous solution BaCl2 is mixied with an aqueois solution of Na2CO3, solid barium carbonate precipitates out of solution. write molecular equation, complete ionic equattionand net equation. is this the right formula??

    asked by julia

  93. 6th grade math

    Problem: How many 3/4ths are in 1? Is the calculation correct? 1 / 3/4 1 x 4/3 = 4/3

    asked by Suzanne

  95. math

    Please explain how you would use a mathematical property to make the following number sentence always true: a x 9 = a x 7 + 2

    asked by M

  96. Physics

    5) An insulated Thermos contains 190 cm3 of hot coffee at 79.0°C. You put in a 11.0 g ice cube at its melting point to cool the coffee. By how many degrees (in Celsius) has your coffee cooled once the ice has melted and equilibrium is reached? Treat the

    asked by john

  97. 11 grade physics

    A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.24 and the push imparts an initial speed of 4.2 m/s?

    asked by Cameron

  98. Physics

    A boy sits on a ferris wheel. how much work is done on him by gravitional forces when the wheel makes one complete turn? Explain.

    asked by Anonymous

  100. chem

    What is the lewis structure for(HN3)

    asked by kary

  101. AP Physics

    An 18.0 kg box is released on a 35.0° incline and accelerates down the incline at 0.269 m/s2. Find the friction force impeding its motion. How large is the coefficient of friction?

    asked by maddy

  102. social studies

    what are ten adjectives that describe road transportation

    asked by allen

  103. 5th grade

    My daughter is taking OLSAT test for gift & talented middle school. All practice questions I find are for Kindergarten or 1st grade. Any ideas on how she should prepare? Thank you.

    asked by Elaine

  105. English

    1.In flat areas, water is pumped out of the ground. Identify prepositional phrase then tell is adjective or adverb phrase 1.in flat areas-adverb of the ground-adverb

    asked by Anonymous

  106. math

    215=93logd how do you solve for d?

    asked by gaf

  107. College algebra

    Solve for z 4(4-2z)+1=7(x+2(1-z))

    asked by chris

  108. math

    At the store, 6 pencils sell for $.99. At this rate what is the cost of 16 pencils?

    asked by Lilly

  110. chem

    at 50.0C the balloon ha a vlomue of 1.78L. Calculate the carbon dioxide density at this temperature.

    asked by julia

  111. algebra

    need to find square root 292

    asked by chris

  112. ochem

    when the concentration of CHBr3 and NaOH are both .145, the rate of the reaction is .0040 M/s. What is the rate of the eaction if the concentration of CHBr3 is doubled?if the conc. is halved?if the two conc. are both increased by a factor of five?

    asked by natalie

  113. statistics probability

    Alice earned a score of 940 on an IQ test.The mean test score was 850 with a standard deviation of 100.(Assume that test scores are normally distributed). Q1a).What proportion of students had a higher score than alice? Qb)Find the score exceeded by 2.5% of

    asked by koo

  115. chemistry

    If I make an ice pack with 750 mL of water, what mass of ammonium chloride must I include to get the temperature to drop from 20 degrees celsius to 5 degrees celsius. The heat of solution of the water and ammonium chloride is 14.8 kJ/mole.

    asked by Anna

  116. calculus

    Find the derivative using the limit process y=cox find dy/dx

    asked by mari

  117. PHYSiCS --

    Volts = 180 Diameter of Beam = 11 Radius of Beam = D/2 = 0.055 (cm) 1/R (m) = 18.18 Current in Coil (I) = 1.02 My calculations for B is not coming out correctly nor is my calculation for e/m How do I go about doing this. I mean I think Im inputting it

    asked by Reema

  118. Language Arts

    In the book, THE GIVER, what did the bicycles symbolize for the Nines?

    asked by Olivia N.

  120. english

    Writing an opposing view essay and am a little stuck on thesis statement. This is what I have so far.... Have you ever taken into consideration that with one action, whether it be a mistake or purposely done, you could be sentenced to death? Many of us do

    asked by Lynne

  121. space

    traveling 10,000 miles per hour how long will it take to get to jupiter from earth

    asked by mateo

  122. 8th grade math

    what percent of 200 is 40

    asked by chasity

  123. Business

    You're an individual investor who holds common stock in a large blue chip company. You've received notice of a proposed change. Instead of using the existing statutory method, the proposal calls for the company's board of directors to be elected by the

    asked by Anonymous

  125. polymer science

    inhibiters are to the monomer for the polymer preparation we need to remove the inhibiters how can remove the inhibiters

    asked by prade

  126. Calculus

    find the equation of a tangent line of x^(1/4) + y^(1/4) = 4 at the point (16,16)

    asked by kevin

  127. algebra

    help me please... The expression for figuring a student's average test score is (p/t), where p is the total points earned on all the tests, and the t is the number of tests. find a student's average when 623 points are earned on 7 tests.

    asked by cindy

  128. chemistry

    how many liters H2O need for incineration 25 L C3H8

    asked by eri

  130. 5th grade math

    10/10 - 5/5 = Iknow the deon. need to be the same do would the answer be 0 would you * 5/5 by 2 to do the problem? Thank you.

    asked by Jill

  131. chemistry

    monoclorur 1 methyl 3 hekzan isomers

    asked by eri

  132. physics

    A 17 kg block is dragged over a rough, hor- izontal surface by a constant force of 170 N acting at an angle of angle 32.1◦ above the horizontal. The block is displaced 33.9 m, and the coefficient of kinetic friction is 0.199. a] find the work done by

    asked by mary

  133. Accounting

    Carpaitha Inc began 2009 with $140,000 in cash. The company plans to have $1,400,000 accrual basis sales revenue during the year, of which it plans to collect 80% in 2009 and the other 20% in 2010. The company plans to record the following expenses in

    asked by Joyce

  135. Chemistry

    If I had one gollan of sodium hydroxide solution which had a concecentration of two pounds of sodium hydroxide per gallon, What would be the concentration of four gallons of that acid?

    asked by Kisha

  136. math

    Hi brigent.How did you know it was 6 weeks?Thanks

    asked by YASMINE

  137. English

    Can you please help me check these sentences? Thank you very much. 1) We have fifty-five minute lessons except for the first and the last lesson which last sixty minutes 2) I have 5 hours of lesson on Mondays, Tuesdays and Thursdays. I have afternoon

    asked by Franco

  138. math - algebra

    how would i solve this using the substitution method 3y=11-x 3x-y=3 thanks

    asked by paul

  140. 8th grade math

    is this expression correct? Question: translate 14 increased by y to an algebraic expression. my answer: 14 + y

    asked by chasity

  141. Cultural Anthropology

    Ethnographic methods are to ethnological methods as

    asked by Anonymous

  142. math

    Write down the gradient and the y-intercept of the straight lines whose equations are given as follows: a) y=2x-4, b) 2y=x+6, c) y-x=2, d) 2x+3y=6-x

    asked by Silas

  143. principles of economics

    Explain how Demand, Elasticity, and Total Revenue are all related to each other. Explain this relationship using at least two examples that incorporates all three concepts. Use examples from personal experience. *can anyone please explain this to me or

    asked by mary

  145. perimeter

    how to draw a 15 cm and 9 cm perimeter

    asked by selina

  146. Critical Reading

    what is an invalid comparison for the analogy: Taking an online class is like?

    asked by Terri

  147. comm/155

    Hi could you check my sentences to see if their right?

    asked by ruby

  148. Algebra 1

    write a function rule for each situation. The volume V(n) of a cube when you know the length n of a side.

    asked by David

  150. English

    I forgot to include the following sentences. I really hope you can have a look at them, too. 1) I dress myself/I get dressed But not I wear myself. 2)R.E. stands for religious education. 3) In winter OR in the winter? Along/on the wall opposite the window

    asked by Franco

  151. Computer/assembly language

    Write a procedure BCD to convert a hexadecimal number in RA into its BCD (binary-coded decimal) representation and place it in RB. The return address should be placed in RF. For example, if RA=0x0024 before the call, RB=0x0036 after the all. // can someone

    asked by traxx

  152. math

    Classify each quadrilateral using the best description

    asked by dana

  153. Algebra 1

    I need to find the equation for these function tables (ex. y=2x). Is there a general formula for finding the equation, or do I have to guess each time? 1. (4,3) (6,13) (8,23) 2. (5,22) (6,15) (7,8) 3. (4, 90) (6,82) (8,72)

    asked by S

  155. Calculus

    The velocity of a car (in miles per hour) is given by v(t) = 61.25t − 17.5 t^2 where t is in hours. Write a definite integral for the distance the car travels during the first 2.5 hours. Use your graphing calculator to find this distance. Distance =

    asked by Jane

  156. space

    gowing 10,00 miles per hour how long will it take to get to jupiter from earth with earth the sun and jupiter alined like a straight line or just an estimation

    asked by mateo

  157. math

    Determine the selling price of a 15-year, 4.725% bond, with $1000 maturity value, with a yield of 4.735%. (Assume twice-yearly interest payments. Round your answer to the nearest cent.)

    asked by liz c

  158. ethics

    What are some examples of organizational culture? Where does organizational culture come from? How do we learn it? How do we know when we have violated it?

    asked by Anonymous

  160. Spanish

    Need help with this activity: Imagine that in your backpack you have several writing implements, all of which are the same size: 2 lápices, 5 bolígrafros, 3 marcadores. If you pull one out at random, what is the percent probability that it will be a

    asked by mysterychicken

  161. math

    Meg's pension plan is an annuity with a guaranteed return of 7% interest per year (compounded monthly). She would like to retire with a pension of $20000 per month for 20 years. If she works 28 years before retiring, how much money must she and her

    asked by liz c

  162. Algebra

    An appliance store manager is ordering chest and upright freezers. One chest freezer costs $250 and delivers a $40 profit. One upright freezer costs $400 and delivers a $60 profit. Based on previous sales, the manager expects to sell at least 100 freezers.

    asked by Alissa

  163. Calculus

    A ball is dropped from the top of a building. The height, , of the ball above the ground (in feet) is given as a function of time, , (in seconds) by y = 1640 - 16t^2 y'= -32t When does the ball hit the ground, and how fast is it going at that time? Give

    asked by Ashley

  165. science

    what are two causes of mechanical weathering ice wedging and _____

    asked by kayla

  166. Physics

    A 67.0 kg base runner begins his slide into second base when moving at a speed of 3.5 m/s. The coefficient of friction between his clothes and Earth is 0.70. He slides so that his speed is zero just as he reaches the base. How much mechanical energy is

    asked by Marcus

  167. college

    Hi, I just want to make sure I am doing this assignment correctly.The question is: How are medical coding, physician, and payer fees related to the compliance process? I believe that they are related because the medical coding specialist is required to

    asked by Aly

  168. Pre-Calc

    I have two questions how do you solve cos x=sqrt2-cosx on the interval of [0,2pi) and how do you verify sin^2(theta)/1-cos(theta)=1+cos(theta) without negating it to equal 1?

    asked by Daniel

  170. AP PHYSICS

    A basketball player makes a jump shot. The 0.700 kg ball is released at a height of 1.90 m above the floor with a speed of 7.00 m/s. The ball goes through the net 3.10 m above the floor at a speed of 3.70 m/s. What is the work done on the ball by air

    asked by Brennan

  171. english 11

    King Arthur legend relates to sir gawain and the green knight and monty python and the holy grail?

    asked by nick

  172. AP PHYSICS

    A 2.30 102 N force is pulling an 80.0 kg refrigerator across a horizontal surface. The force acts at an angle of 21.0° above the surface. The coefficient of kinetic friction is 0.200, and the refrigerator moves a distance of 7.00 m. Find the work done by

    asked by Ashley

  173. math

    Maratha paid $42.40 for her sisters birthday present. this included 6% sales tax. What was the cost of the gift before tax?

    asked by lilly

  175. Language Arts

    Are these real words? surfeitly surfeitness surfeitous

    asked by Anya

  176. calculus

    find point(s) on the graph of the function f(x) = x^3 - 2 where the slope is 3

    asked by Jazmin

  177. PLEASE HELP - english

    If something has a higher surface area what does that mean? can it me said that it is more thicker? please and thank you

    asked by eddy

  178. algebra

    3/4n - 8 = 91 simplified, what is n?

    asked by Serina

  180. health

    A 72-year-old man is diagniosed with a 7 cm primary tumor in his colon, which has spread to the liver. Which of the following features indicates that the tumor is malignant? The location of the primary tumor or The spreading of the tumor. _I think it is

    asked by betty

  181. math

    Joaquin makes $600 a week. A raise of $24 a week represents what % of his salary?

    asked by Michelle

  182. microeconomics problems

    The GreenAcres mowing company wants to buy the new “Titan3000” lawn mowers. Assume that the lawn mowers are expected to last indefinitely, that operating expenses are negligible, and that the price per acre of mowed lawn is expected to remain constant

    asked by linda

  183. Chemistry

    1) When hydrazine (N2H4) is burned in a 253-g brick container, the temperature of the brick increases by 5.13 degrees Celsius. Calculate the quantity of heat released in this raection. The specific heat of brick is 0.840 J/(gC). 2) A sample of coal is

    asked by Sarah

  185. social studies

    outline any five skills that all effective parents must have

    asked by esther

  186. math

    Evaluate (3 + 4) + 1 in the mod 5 system

    asked by mike

  187. calculus

    use epsilon delta to prove the following lim x^2-9/x+3 =-6 x->-3

    asked by pinki

  188. Chemistry!

    Hey jiskha. Microwave ovens emit microwave radiation that is absorbed by water. The absorbed radiation is converted to heat that is transferred to other components of the food. Suppose that the microwave radiation has a wavelength of 12.7 cm. How many

    asked by Alex

  190. math

    Floria wnats to buy a dress that costs $96. She has saved $60 for the dress. what percent of the price of the dress has she saved?

    asked by Michelle

  191. geography

    Which continents does the Tropic of Cancer pass through? North America, Africa, and Asia----Is that correct? If it is not can you direct me to a better website for a map that is clearer then the one I looked at to show me this answer?

    asked by Reed

  192. phys hmwk help

    A gas is taken though a single process in which its volume decreases by .25 m^3 as the temp of the gas rises 2deg C. Which of the following people are more likely to have reached the correct conclusion? a. Bob ids this process as adiabatic b. Jill ids this

    asked by Jarod

  193. mat116

    In a triangle ABC, angle B is 4 times angle A and angle C is 16 degrees less than 5 times angle A. What is the size of angle A _____ B _____ and C _____ I would like to learn this so please be so kind to walk me through the steps. I appreciate you very

    asked by thawk

  195. 6th grade english

    Is "reminds" a present, present participle, past, or past participle? Kim "reminds" Robin of their five days at camp.

    asked by Suzanne

  196. math

    matthew got 36 problems right out of a total of 40 problems on a test. What percent of the problems did he get right?

    asked by Michelle

  197. ethics

    How do you think slavery influenced the evolution of both Black and White America today? Explain your answer. (Schaefer, 2006, p. 207)

    asked by Dawn Busbee

  198. Chemistry

    1) When hydrazine (N2H4) is burned in a 253-g brick container, the temperature of the brick increases by 5.13 degrees Celsius. Calculate the quantity of heat released in this raection. The specific heat of brick is 0.840 J/(gC). 2) A sample of coal is

    asked by Sarah

  200. AP US History

    The South Carolina Crisis of 1832-1833 resulted in a. a clear victory for the federal government or d. unanimous support in South Carolina for nullification The following, except one, were important manifestations of anti-foreignism in the 1850's: a. the

    asked by Kylie

  201. math

    Mrs.rushford began to hike at an elevation of negative 40 feet. her elevation decreased by 90 feet in one hour what was Ms.rushford elevation after 1 hour

    asked by brooke

  202. math

    need help please. thanks evaluate and simplify. (8x/y) for x=10 and y=2

    asked by charlie

  203. algebra I

    use mulitplying by 1 to find an expression equivalent to (10/13) with a denominator of 39a Thank you for your help.

    asked by adore001

  205. math

    whats 5 to the seventh power and whats 5 to the third power

    asked by brooke

  206. English

    Can you please check these sentences please? Thank you. 1) Along the wall in front of the left window there is a book closet (correction: book shelf) 2)What distance do you walk to school every day? OR How far do you walk to school every day? 3) They have

    asked by Franco

  207. Macroeconomics

    How would i approach this question? I don't necessarily want an answer. A "how to" would be better. (Simple Spending Multiplier) For each of the following values for the MPC, determine the size of the simple spending multiplier and the total change in real

    asked by Lauren

  208. physics

    if you were stationary in space at the same distance from the sun as the eath is, how much force would the sun be exerting on you? what would be your acceleration towrd the sun? what would be the sun's acceleration toward you? okay so im a little confused

    asked by Anna

  210. U.S. Presidents

    Are former presidents of the United States who are still alive today have retired from politics? I think it's obvious that it's true, but George W. Bush is still the owner of the MLB's Texas Rangers.

    asked by AL 92

  211. Calculus

    What are the antiderivites of x/ (x^2 (squareroot of x^4-1)) and 1/ (1+(x^2/4)) no idea :{

    asked by kevin

  212. math

    on a loan of $3,500, manny had to pay $280 interest. The interest was what percent of mannys loan?

    asked by Michelle

  213. chemistry please help!!

    for thr reation: 2AlCl3 + 3H2SO4= Al2(SO4)3 + 6 HCl How many grams of H2SO4 are needed to produce 27.0 grams of Al2(SO4)3

    asked by Lillian

  215. 8th grade math

    Translate the phrase to an algebraic expression. Justin had $31 before spending q dollars on jeans. How much money remains? Thank you

    asked by chasity

  216. psychology

    how can i compare and contrast neurophysiological substrates toward a personal situation

    asked by angela

  217. Chemistry

    At the same cost per pound, which alcohol, CH3OH or C2H5OH, would be more economical to purchase as an antifreeze for your car? Why?

    asked by Sarah

  218. math

    Carl weighed 180 pounds. After two months of dieting and exercising, he lost 9 pounds. What percent of his weight did he lose?

    asked by Michelle

  220. English

    Hi I have to do a presentation on the graphic version of the novel "Kidnapped" by Robert Louis Stevenson. I plan on doing a powerpoint (it's on tuesday ahh). I was wondering what key points i should mention and describe. Please help, I am stressing over

    asked by Jon

  221. marketing

    product is not concerend with

    asked by cb

  222. geology

    what is the primary basis for differentiating the eras?

    asked by lisa

  223. math

    I need help with a quiz, it has 30 questions, can you help?

    asked by Tammy

  225. math

    margaret is reading a book that is 288 pages long. If she has already read 96 pages,what percent of the book has she read?

    asked by Michelle

  226. English

    1.Another Chinese method of irrigation is shown in the lower picture. 2.In flat areas, water is pumped out of the ground. 3.Farmers build ridges around the terraces so that the terraces can be flooded during the growing season. 4.As you can see, water from

    asked by Clayton

  227. sociology

    Describe other measurements besides IAT sociologist utilize to calculate prejudice?

    asked by Shantai

  228. HIS 135

    Describe the teenage culture that first developed in the United States after WWII. Consider why teenagers were considered a separate culture, and describe the characteristics that made their culture unique

    asked by Pam

  230. Physics

    A child is walking along the sidewalk at a speed of 1 m/s while pulling his wagon. The wagon weighs 56 N. If the child pulls at an angle of 12o, and the the coefficient of kinetic friction is 0.40, then how hard does the child pull on the handle?

    asked by Anonymous

  231. Physics

    what propels a rocket away from the surface of the earth?

    asked by Rose

  232. Physics

    what propels a rocket away from the surface of the earth?

    asked by Rose

  233. None

    How is a circle like a human?Please do 3 reasons.

    asked by Yan

  235. Maths

    Find the gradient of the curve xy^3 = 5 ln y at the point (0,1).

    asked by Anique

  236. English

    Thank you very much for your corrections! Can you check these few sentences plese? 1)I get the bus that crosses my village at five to seven. 2) 2016: twenty sixteen OR Two thousand and sixteen. 1805: eighteen oh five OR eighteen hundred and five. 3) She's

    asked by Franco

  237. math

    The johnson family spends $675 a month on rent. if their monthly income is $2,700, what percent of their income goes to rent?

    asked by Michelle

  238. math

    The trough is in the shape of a triangular prism. It is 5 ft long and its vertical cross sections are isosceles triangles with base 2ft and height 3ft. Water is being siphoned out of the trough at the rate of 2 cubic feet per minute. At any... time t, let

    asked by LOKAA

  240. Algebra help+check please?

    Graph the function. Compare the graph with the graph of f(x)=x q(x)=x-1 How would I do this? Cause, I do know that f is the same thing as y and so that in the problem it'd be y=x-1 right? Could somebody please explain how to do this STEP by STEP?

    asked by Allyson

  241. child care

    why is the incubation stage of an illness of concern to day care workes?

    asked by tassey

  242. english

    I am writing an oppossing view essay. For this part of the essay we are not supposed to take a stance. The teacher has broken the assignment into 2 parts. The 1st part is actually just to help us learn how to write our final essay. I have pulled alot of

    asked by Lynne

  243. child care

    the main difference between emergency care and first aid is the

    asked by tassey

  245. Physics

    A child is walking along the sidewalk at a speed of 1 m/s while pulling his wagon. The wagon weighs 56 N. If the child pulls at an angle of 12o, and the the coefficient of kinetic friction is 0.40, then how hard does the child pull on the handle?

    asked by Anonymous

  246. Critical Reading

    An argument is a message that is being sent with the purpose of persuading us to accept certain information true or false. I would say true. Would that be right?Thank you!

    asked by Michelle

  247. pre calculus

    f(x)= a+tan(bx) fina a and b f(0)= 5 f(pi/8)=1/sq root of 3 +5

    asked by Caitlyn

  248. Maths

    Find the gradient of the curve xy^3 = 5 ln y at the point (0,1).

    asked by Anique

  250. chem

    Liquid water has a density of 1.00g/mL at 10.0C and .996g/mL at 30.0C. Calculate the change in volume that occurs when 500mL of water is heated from 10.0C to 30.0C.

    asked by julia

  251. math; distributive property;perimeter of a triangl

    How do I find the perimeter of a triangle if each side has an expression such as: 3x, and the second side let's say -4y, or the third side is -3x...something like that. Please help. I'm trying to study.

    asked by Kyra

  252. Business

    Hiring o Performance evaluations o Discipline o Termination o Diversity o Harassment o Manager as a role model • Write a 1,050- to 1,400-word paper addressing the following points: o Describe the moral and ethical issues faced by managers dealing with

    asked by Jessica

  253. Geometry

    How do I solve this problem? Point P is between points L and M. LM = 10x, LP = 2x + 4, and PM = 3x + 16. Solve for x.

    asked by Terri

  255. Calculus

    find dy/dx and d^2y/dx^2 of 3x(y^2) -2y=2

    asked by smokey

  256. math

    Two cars have a head on collision. Both are traveling at 28 m/s toward each othe. Car A has a mass of 700 kg and car B has a mass of 904kg. What is car B velocity after the impact?

    asked by Mayte

  257. child care

    the introductuion of semisoild foods to a fivemonth old infant may be delayed if

    asked by tassey

  258. PSY/202

    The issue that discusses whether development is more a function of biology or more a function of the environment is the ______________ controversy.

    asked by Liz

  260. Science

    are mixtures heterogeneous or homogenous? are compounds heterogeneous or homogenous? which one is both heterogeneous and homogenous? Can a mixture be separated physically or chemically? What about a compound? please help

    asked by alicia

  261. child care

    a condition often brought on by an allergic reactionis

    asked by tassey

  262. Physics

    3. You have a simple circuit with a light bulb (R = 50 Ω) and a power supply (you can treat it like a battery with 120 V). Unfortunately, a loose screw fell on the circuit and is connected in parallel to the light bulb. You can treat the screw as a

    asked by Tiffini

  263. biology

    Other than transporting oxygen, what other important function does hemoglobin perform?

    asked by Michael

  265. Epidemiology

    what was the primary outcome variable of interest for alcohol consumption and peripheral arterial disease What was a primary study exclusion criterion

    asked by Cindy

  266. Math rational exponents

    what is the domain of these functions? y= -1/5x^(-1/3) and y=10x^ (-1/6)

    asked by Charm

  267. statistics

    Please help!! I have been researching this online for hours with no luck... Q: What is the scope and scale of a chart or graph?

    asked by Angela

  268. math

    Margaret is reading a book that is 288 pages long. If she has already read 96 pages, what percent of the book has she read? And what percent of the book does Margaret have left to read?

    asked by Michelle

  270. Spanish

    Are these correct? 'Write the time in sentence form in Spanish for each of the following:' 1:15- una y cuarto 4:45- Son las cinco menos cuarto 7:10- siete y diez Thanks -MC

    asked by mysterychicken

  271. child care

    my answer is (d) the infant is teething

    asked by tassey

  272. physics please help

    The femur is a bone in the leg whose minimum cross-sectional area is about 3.60 10-4 m2. A compressional force in excess of 6.90 104 N will fracture this bone. (a) Find the maximum stress that this bone can withstand. (b) What is the strain that exists

    asked by dan

  273. Physics

    A solid ball of mass m rolls along a horizontal surface with a translational speed of v. What percent of its total kinetic energy is translational?

    asked by Lacey

  275. 9th grade

    1+9a-8=8a

    asked by alicia

  276. Chemistry

    In the study of biochemical processes, a common buffering agent is the weak base trishydroxymethylaminomethane, often abbreviated as Tris. At 25 C, Tris has a pKb of 5.91. The hydrochloride can be abbreviated as Tris HCl. What volume of 10.0 M NaOH is

    asked by Alexandra

  277. Chemistry

    How many pi bonds are in ritalin. I counted 4 pi bonds(double bonds), and 18 sigma bonds(single bonds> I want to make sure I didn't miss count anything.

    asked by Kristy

  278. Maths

    what are these decimals into fractions and in their lowest terms: 0.19 and 0.06 Please help!

    asked by Mary

  280. life science

    a.)What are the steps of mitosis? b.)Explain what each of the steps mean. c.)What are the steps of cell division? d.)Explain what each of the steps mean. e.)Compare and contrast mitosis and cell division.

    asked by Bridgett

  281. Chemistry

    How many pi bonds are in ritalin. I counted 4 pi bonds(double bonds), and 18 sigma bonds(single bonds> I want to make sure I didn't miss count anything.

    asked by Kristy

  282. Language Arts

    Can "deaf" be an antonym for "auditory"?

    asked by Anonymous

  283. projectile motion

    You fire a squirt gun horizontally from an open window in a multistory building and make note of where the spray hits the ground. Then you walk up to a window 5.0 m higher and fire the squirt gun again, discovering that the water goes 1.5 times as far.

    asked by leila

  285. math

    you have 6pieces of wood, you have to put them together to make a picture frame two pieces are 8in long,two are 6in long and two are 4in long. Using 4 of the pieces how many rectangle picture frames can you make? Would it be two?

    asked by Jill

  286. projectile motion

    A home run just clears a fence 105 m from home plate. The fence is 4.00 m higher than the height at which the batter struck the ball, and the ball left the bat at a 31.0° angle above the horizontal. At what speed did the ball leave the bat

    asked by leila

  287. Chemistry

    How many pi bonds are in ritalin. I counted 4 pi bonds(double bonds), and 18 sigma bonds(single bonds> I want to make sure I didn't miss count anything.

    asked by Kristy

  288. math-algebra

    how do i solve this using the substitution method 3x+2y=7 2x-3y=-4 x=7-2y/3 2(7-2y/3)-3y=-4 this is where i get stuck help would be much apprieciated

    asked by peter

  290. Physics

    A lumberjack (mass = 98 kg) is standing at rest on one end of a floating log (mass = 245 kg) that is also at rest. The lumberjack runs to the other end of the log, attaining a velocity of +2.7 m/s relative to the shore, and then hops onto an identical

    asked by Jeffrey

  291. math

    What is 35% of 63? a. n x 0.35 = 63;180 b. n= 35 x 0.63; 22.05 c. n= 35 x 63; 2,205 d. n= 0.35 x 63; 22.05 i thought it was b or d?

    asked by Lilly

  292. Physics

    Suppose two blocks of ice are heading toward each other. block A has a mass of 4.24 kg and is traveling at 2.24 m/s. Block B has a mass 4.42 kg and is traveling at 2.24 m/s in the opposite direction. After the collision they are traveling in the same

    asked by Mayte

  293. college

    Hi, I just want to make sure I am doing this assignment correctly.The question is: How are medical coding, physician, and payer fees related to the compliance process? I believe that they are related because the medical coding specialist is required to

    asked by Aly

  295. linear algebra

    Find the equation of the plane for which each point is equidistant from P(2,1,1) and Q (-4,7,9). Show all work

    asked by Stephanies

  296. geography

    Because the Western Ghats block the monsoon winds, the interior of the subcontinent has a climate that is

    asked by Anonymous

  297. Physics

    One gram of water changes from liquid to solid at a constant pressure of 1.00 atm and a constant temperature of 0°C. In the process, the volume changes from 1.00 cm3 to 1.14 cm3

    asked by Mike

  298. Maths

    Express Each percentage as a fraction in it's lowest term? 25%, 60%, 45%, 8.2%, 90%, 88.6%, 49.6%, 65%,8%, 98%, 94%, 76%, 20%, 57%, 32.4% and 30% Please Help!

    asked by Lucy

  300. Physics - Free Fall

    A stone was thrown into the air and returned after 4.2 seconds. a) At what speed was the stone thrown? (20.6)

    asked by Brianna

  301. chemistry

    How does the outer nth level in electron configuration compare to the period? and which level would be the exception?

    asked by Anonymous

  302. chemistry

    What is the volume of 1.40 moles of nitrogen gas at 20.0°C and 770. torr?

    asked by Kiesha

  303. College Algebra 2

    (x^2-6xy+y^2) + (3x^2-4y^2)

    asked by Jesus

  305. algebra

    Use muliplying by 1 to find an expression equivalent to 10/13 with a dominator of 39a Please kindly help. I don't understand what to do. Thanks!

    asked by tiffany

  306. Chemistry please help!

    Suppose you had 5 gallons of sodium hydroxide solution which had a concentration of two pounds of soduium hydroxide per gallon. What is the total amount of sodium hydroxide?

    asked by Kisha

  307. ap physics

    A 22.7 kg mass attached to a spring scale rests on a smooth, horizontal surface. The spring scale, attached to the front end of a boxcar, reads T = 21.9 N when the car is in motion. If the spring scale reads zero when the car is at rest, determine the

    asked by annie

  308. inter Algebra

    A startup company can sell 1000 computers if they price them at $500. The number sold will increase by 10 for every $1 decrease in the price. The company has fixed costs of $100,000, and each computer costs 4300 To produce. find the price that will

    asked by linda

  310. Physics

    A series of waves traveling at 200 m/sec are being generated by a 100 Hz source. A point at the very top of the crest of a certain wave is ____ meters from a corresponding point 3 crests away. a. 0 b. 1.5 c 2.7 d 4 e 6 f 12 g 16 h 30,000 I have no clue

    asked by Jael

  311. Precalculus

    How would you solve an exponential equation like this... 2^(3x+1)= 3^(x-2)

    asked by Juliet

  312. inter Algebra

    Pick a car and find its top speed. Assuming that your chosen car reaches its top speed at the top of a ramp, leaving the ramp vertically 20 feet about the ground: 1.) When will the car land back on the ground? 2.) When would the car be traveling the

    asked by linda

  313. chemistry

    If a sample of pure cadmium has a mass of 18.2 grams, how many moles of cadmium are in the sample?

    asked by hippie

  315. english

    I have to wrtie a paragraph in which I make claim, state thesis, can not use "For instance or for example and support with 4 examples.I choose this prompt "The internet is a much better resource for students than a library" Please tell me how to start this

    asked by Lisa

  316. math

    atrtie and Billy both shop at the same local grocery store between 5 and 6 in the evening.The last time they saw each other was on Tuesday.Artie shops every five days and Billy shops every days.What day of the week will they next run into each other,

    asked by YASMINE

  317. Chemistry

    How many moles of hydrogen are consumed when 40.0 L of hydrogen chloride gas are produced in the following equation? H2(g) + Cl2(g) 2 HCl(g)

    asked by Kiesha

  318. inter Algebra

    A start up computer company can sell 1000 computers if they price them at $500. The number sold will increase by 10 for every $1 decrease in the price. The company has fixed costs of $100,000, and each computer costs $300 to produce. Find the price that

    asked by linda

  320. SPEED and VELOCITY

    I thought that they were the same thing. Are they not? What would be some examples for Velocity

    asked by Anonymous

  321. math

    Louis and his family are going to the zoo. The price of a bus ticket is $1.00, but the family has some coupons. If Louis pays full price, his wife pays 2/3 of the regular price, and the two children pay 1/2 of the regular price. How much will it cost for

    asked by shun

  322. chem

    would the molar mass of a volatile liquid, calculated using the procedure in this experiment, be incorrectly high, incorrectly low, or unaffected by the following? You forgot to measure the volume of the flask, so you used the volume printed on the g=flask

    asked by thomas richards

  323. math

    In the diagram show, every point in the plane with integer coordinates is labeled with a positive integer by a “rectangular spiral” process that begins at the origin and works its way out. What are the coordinates of the point labeled 1009?

    asked by sky

  325. math

    1/7 as a percent?

    asked by Lilly

  326. inter Algebra

    r+s=5 3s+2t=-1 4r+t=14 ican u breakdown the answer I get half way though i forgot the last pat wheater i put it back into the original equationn alot of steps i get lost

    asked by linda

  327. Science

    A roller coaster is moving at 10 m/s at the top of a hill and 22 m/s at the bottom of the hill two seconds later.Explain how to find the average acceleration of the roller coaster, then find the average acceleration.

    asked by Tay Davis

  328. phys hmwk

    A spring that is .7m in length elongates to 1.06 m when a 20 newton force is exerted to stretch the spring. By how much more does the spring stretch when an additional 8 newtons of force is exerted on it? Do i use the hooke's constant equation for this? if

    asked by Jarod

  330. physics

    What length pendulum will produce a period of 1.0s?

    asked by hannah

  331. Calculus

    find dy/dx and d^2y/dx^2 of 3x(y^2) -2y=2 please give the answer not an example that dosent help me

    asked by smokey

  332. science Help for little brother

    I have no clue how to do this... For a science fair experiment, you decide to testa cartain type of plant to see how well it can grow when it is kept out of sunlight. For two weeks, the plant leaces stay greean then they begin to look yellow. Use the terms

    asked by Bridgett

  333. Algebra HELP

    how to solve this equation in the real number system: 2x^(3) + 3x^(2) + 2x + 3 = 0 steps please

    asked by Amy

  335. Chem

    The heat of combustion of octane (C8H18) is 47.8 kJ/g and one gallon of C8H18 has a mass of 2620 g. If a car using octane is driven 10,000 miles in one year and gets 25 miles per gallon of octane, what is the total energy consumption? 1. 5.01 × 107 kJ 2.

    asked by Kai

  336. Maths

    what are these fractions as pencentages: 2/3 1/13 9/23 4/15 6/7 3/7 2/7 and 2/21 Please Help!

    asked by Amy

  337. accounting

    OBX Mufflers accepted a five-month, 7.5% interest, $2,400 note from ABD Motors on June 1, 2008. The entire balance is payable at the note's maturity. What will be the total payment on October 31, 2008? Total payment= $

    asked by Joyce

  338. Chemistry 111

    Whatis the gas produced when you add NaHCO3 to methyl salicylate?

    asked by Gaby

  340. U.S. History

    What is proportional representation? How does it work? I've googled it and the answers I'm getting are super lengthy, and hard to understand. If it helps, I am currently studying the Great Compromise/The Connecticut Plan of Govt. Make it short, sweet, and

    asked by LouLou

  341. To Aly

    You have posted the identical post several times, but obviously did not take the time to read the responses you have received. Please scroll down and find your earlier posts -- and read the responses. Your posts are blocked for the time being, to give you

    asked by Writeacher

  342. physics

    what is theta, the x component, and the y component if you know the following standard vector notation: 239 m @ 261 degrees magnitude: 239 m navigational angle: 261 quadrant:3

    asked by Haley

  343. math correct or not?

    1. 19 is what percent of 40 a. 19=n x 40;47.5% b. 40=19 x n;2.1% c. 40=19 x n;40.4% d. 19=n x 40;52.3% is it a? 2.64 is 80% of what? a.64 x n=80; 0.8 b.0.64 x n=80; 125 c.60= 0.80 x n;80 d.80=64 x n;1.3 is it c?

    asked by Lilly

  345. biology nutrition

    What plant did the greeks use as a digestive tonic when they had overeaten other foods?

    asked by Lindsey

  346. VELOCITY

    What are some examples of velocity?

    asked by Anonymous

  347. Physics

    does a baseball thrown at 100 miles per hour have a lot of force?

    asked by Rose

  348. accounting

    O'Hara Inc. made sales of $310,000 during 2008, it's first year of operations. Of this, $15,000 remained in accounts receivable at the end of the year. Additionally, the company paid and incurred $270,000 in expenses during the year. The company also

    asked by Joyce

  350. PHYSICS CIRCULAR MOTION GRAVITATIONAL CONSTANT

    Three masses are arranged in an (x, y) plane. 7 kg (-3,1) 8 kg (0,0) 9 kg (1,2) a) What is the magnitude of the resulting force on the 8 kg mass at the origin? The universal gravitational constant is 6.6726 × 10^−11 N · m^2/kg^2. Answer in units of N.

    asked by Jaylee

  351. Calculus

    A baseball diamond is a square with side 90 feet. A batter hits the ball and runs toward first base with a speed of 24 f/s. At what rate is his distance from second base changing when he is halfway to first base?

    asked by John

  352. physics.

    knowing the following: standard vector notation: 46.9 km@ 32 degrees magnitude: 46.9 km theta 58 quadrant 1 x component 24.9 y component 39.7 What would the navigational angle be

    asked by Sydney

  353. EDU310

    What roles do school teachers play in their community

    asked by Anonymous

  355. iloj

    The number of students attending the fall play was 150 more than the number of adults attending. Students tickets cost $3, and adults $5. A total of $4730 was collected. How many students attended the play?

    asked by kk

  356. Physics

    A 0.400 kg block of wood hangs from the ceiling by a string, and a 0.0700 kg wad of putty is thrown straight upward, striking the bottom of the block with a speed of 5.80 m/s. The wad of putty sticks to the block. Is the mechanical energy of this system

    asked by Josie

  357. econ 312

    How has the US GDP fared during the last couple of years?

    asked by larry

  358. english

    ants came to our picnic.

    asked by Anonymous

  360. chem

    Liquid water has a density of 1.00g/mL at 10.0C and .996g/mL at 30.0C. Calculate the change in volume that occurs when 500mL of water is heated from 10.0C to 30.0C.

    asked by ESTR3LLA

  361. English

    I wrote a paper on Beloved, now I am required to do a MLA Documented Research Paper on this topic. I am stuck on how to begin with a Thesis Statement (subject and predicate)

    asked by Tyler

  362. math

    Bob makes 5.5% commision selling eletronics. How much commission dose she make if she sells a flat-screen TV for %10,000? how would i solve this?

    asked by Lilly

  363. science

    I have no clue how to do this... For a science fair experiment, you decide to testa cartain type of plant to see how well it can grow when it is kept out of sunlight. For two weeks, the plant leaces stay greean then they begin to look yellow. Use the terms

    asked by Bridgett

  365. Physics

    When work is done to increase the potential energy of an object without increasing its kinetic energy, is the net force acting on the object greater than zero?Explain.

    asked by Nicole

  366. social studies

    what are ten adjectives that describe road transportation

    asked by allen

  367. history

    what are ten adjectives that describe water transportation

    asked by allen

  368. Chemistry Help!!!

    1) When hydrazine (N2H4) is burned in a 253-g brick container, the temperature of the brick increases by 5.13 degrees Celsius. Calculate the quantity of heat released in this raection. The specific heat of brick is 0.840 J/(gC). 2) A sample of coal is

    asked by Sarah

  370. Physics

    Suppose two blocks of ice are heading toward each other. block A has a mass of 4.24 kg and is traveling at 2.24 m/s. Block B has a mass 4.42 kg and is traveling at 2.24 m/s in the opposite direction. After the collision they are traveling in the same

    asked by Mayte

  371. math

    you have 6 pieces of wood 2-8in,2-6in,2-4in to make a rectangle picture frame using 4 pieces of wood how many frames can you make? (rectangle frames) Would it be 2?

    asked by Jill

  372. Chemistry

    What is the maximum volume of 30 M NaCl that can be prepared from 60 g NaCl(s)?

    asked by Astrid

  373. Math

    A Classroom contains a total of 27 students. The number of girls is 7 more than three the number of boys. How many boys are in the class?

    asked by Camille

  375. history

    what are ten adjectives that railroad transportation

    asked by allen

  376. Physics

    You wish to make a mass on a spring oscillate with a period of 1.00 seconds, to count heartbeats. The spring constant is 50.0 N/m. What mass should you put on the end of the spring?

    asked by Laura

  377. Math

    What the difference of inverse and linear in mathmatical terms

    asked by Cheralia

  378. Physics

    You are standing 0.75 m from your bathroom mirror in the morning. How far away is your image from you?

    asked by Laura

  380. chem

    A 4.1 L sealed bottle containing 0.25 g of liquid ethanol, C2H6O, is placed in a refrigerator and reaches equilibrium with its vapor at -11°C. The vapor pressure of ethanol is 10 torr at -2.3°C and 40 torr at 19°C. (a) What mass of ethanol is present in

    asked by Anonymous

  381. calculus

    A ball is dropped from the top of a building. The height, , of the ball above the ground (in feet) is given as a function of time, , (in seconds) by y = 1640 - 16t^2 y'= -32t When does the ball hit the ground, and how fast is it going at that time? Give

    asked by Ashley

  382. Physics

    A train coming toward you at 15 m/s blasts a signal which you hear as 400 Hz. What frequency will you hear after the train passes? Assume the speed of sound is 343 m/s.

    asked by Laura

  383. physics

    if earth is having one hole at one of the poles and also having another hole at other pole .if we drop a ball from one hole what will happen to that ball?

    asked by naufal

  385. Physics

    A man uses a pulley arrangement to lift a heavy crate.He applies a force that is one-fourth the weight of the crate, but moves the rope a distance four times the height that the create is lifted. Is the work done by the man greater than, equal to, or less

    asked by Adriana

  386. World History

    The populations of early villages were able to grow mostly due to...?

    asked by Nissa

  387. COM_155

    How do i write three sentence using plurals correctly and three sentences using possessives correctly on the topic of how to store personal financial information effectively and efficiently.

    asked by Sasha

  388. Forensics

    What is a follicular tag and how can it be used to implicated a suspect of a crime?

    asked by Courtney

  390. math

    3.5x-2 = 4x+1

    asked by allen

  391. social studies

    if you own a factory the factory and any equipment in it are part of your... answer is 7 letters fourth letter is an i... i have been through everything in my study guide and cannot find the answer for this one...

    asked by emily

  392. English

    1.Many of the Chinese people are farmers. 2.They generally work their farms by land. 3.Chinese farmers usually use hand tools instead of large machines. 4.Farmland throughout China is carefully prepared, planted, and weeded. 5.Farmers also harvest their

    asked by Clayton

  393. variables

    solve for w -2(w-4)=4w+26

    asked by desmond

  395. calculus

    a rectangular box is to have a square base and a volume of 20 ft cubic if the material for the base costs 30 cent per square foot, the material for the sides cost 10 cent per sqaure foot, and the material for the top costs 20 cents per square foot,

    asked by soraya

  396. Europe

    HOw does the physical geography of Europe affect its political, social, and economic charateristics?

    asked by Lucy

  397. social studies

    you should always read the ______ before you a buy a product... answer is 9 letters long third letter is an a...

    asked by emily

  398. social studies

    Opening statement: Give who,what,when,where,why of the topic. The British Navy in the American revolution. In one sentence.

    asked by Michelle

  400. math

    Artie and Billy shop at the same grocery store between 5 and 6 in the evening.The last time they saw each other was on Tuesday.Artie shops every 5 days and Billy shops every 4 days.What day of the week will they next run into each other at the

    asked by YASMINE

  401. 5th grade

    Possessive nouns A communities' elected officials were often members of the gentry.

    asked by Macaila

  402. Chemistry

    How many pi bonds are in ritalin. I counted 4 pi bonds(double bonds), and 18 sigma bonds(single bonds> I want to make sure I didn't miss count anything.

    asked by Kristy

  403. chemistry

    Surface tension explains which of the follow- ing phenomena? I) A piece of aluminum foil floating on a lake II) A bowling ball sinking more slowly through molasses than through water III) Separating ethanol from water by distillation IV) Water beading on a

    asked by Bob

  405. Physics - momentum

    Two hockey players are traveling at velocities of v1 = 15 m/s and v2 = -16 m/s when they undergo a head-on collision. After the collision, they grab each other and slide away together with a velocity of -3.8 m/s. Hockey player 1 has a mass of 121 kg. What

    asked by J Velji

  406. Science

    What is the difference between rhyolite and basalt?

    asked by Jan

  407. EDU310

    Even though the education profession continues to be a lower paying profession than other career opportunities, why do people continue to become teachers

    asked by Anonymous

  408. Physics

    A vertical spring (ignore its mass), whose spring stiffness constant is 880 N/m, is attached to a table and is compressed down 0.160 m. (a) What upward speed can it give to a 0.300 kg ball when released? (b) How high above its original position (spring

    asked by Joe

  410. English

    I have a few doubts regarding the following questions. Can you help me, please? 1)Provide a definition of "poetry" including its most important elements. 2)Briefly refer to the description of the mirror as provided by Sylvia Plath in her poem "Mirror"?

    asked by Franco

  411. Physics

    A 260 kg piano slides 4.1 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (Fig. 6-36). The effective coefficient of kinetic friction is 0.40. (a) Calculate the force exerted by the man. (b)

    asked by Joe

  412. Calculus Tangent lines

    find the equation of a tangent line of x^(1/4) + y^(1/4) = 4 at the point (16,16)

    asked by kevin

  413. math

    Convert 50 mim/h to feet per minute. use dimensional analysis.

    asked by Anonymous

  415. Physics

    Two hockey pucks approach each other as shown in the figure below. Puck 1 has an initial speed of 22 m/s, and puck 2 has an initial speed of 14 m/s. They collide and stick together. Find the components along x and y of the initial velocities of both

    asked by J Velji

  416. Chemistry

    If the amount of raidoactive iodine-123 in a sample decreases from 0.4 to 0.1 g in 26.2 hours, what is the half-life of iodine-123?

    asked by Erin

  417. Physics

    Two cars have a head-on collision. Both were traveling at 28 m/s toward each other. Car A has a mass of 700 kg and car B has a mass of 904 kg. After the impact, what is car B's velocity?

    asked by Mayte

  418. Chemistry

    How many grams of NO gas can be produced from 80.0mL of 4.00M HNO3 and excess Cu? 3Cu + 8HNO3---3Cu(NO3)2 + 4H20 + NO

    asked by Erin

  420. English

    Apostrophe's Possessive Nouns Churches best seats were reserved for members of the gentry.

    asked by Macaila

  421. Chemistry

    What is a enantiomer?

    asked by Alex

  422. Algebra: exponents

    (b^(-4y+7))(b^y) / b I got 1 / b^(3y-8) but the answer is supposed to be 1 / b^(3y+6) ? could someone write the steps to solving this?

    asked by Amy

  423. English

    Apostrophe's Possessive Nouns The "middling class" include a towns shopkeepers.

    asked by Macaila

  425. chem

    well it saids: A 1.50L rubber balloon is filled with carbon dioxide gas at a temperature of 0.00C and a pressure of 1.00 atm. the density of the carbon dioxide gas under these conditions is 1.98g/L. a)at 50.0C the balloon ha a vlomue of 1.78L. Calculate

    asked by julia

  426. English

    How is Hamlet a tragic hero? Explain. My first point is that he was sucked into his own darkness when he was trying to kill Claudius. I need some points...help ):

    asked by Alicia

  427. English

    Apostrophe's Possessive Nouns In the middle class, a family's income was produced by both the husband and wife.

    asked by Macaila

  428. English

    Apostrophe's Possessive Nouns The wealthier peoples class was called the gentry.

    asked by Macaila

  430. science

    freezing and thawing cycle that causes potholes in roads and breaks in rocks ___ ___ ___ ___ ___ ___ ___ ___ ____

    asked by kayla

  431. math

    find the measure of the angles in triangle ABC m

    asked by bella

  432. 3rd grade

    would you use 1000 as a benchmark to estimate the number of shoes in your classroom?

    asked by cat

  433. science

    acid produced by some plant roots __ __ ___ ___ __ __

    asked by kayla

  435. 8th grade math

    seeking help. Justin had $31 before spending q dollars on jeans. how much money remains? (translate phrase to an algebraic expression)

    asked by chasity

  436. math

    Determine the selling price of a 15-year, 4.725% bond, with $1000 maturity value, with a yield of 4.735%. (Assume twice-yearly interest payments. Round your answer to the nearest cent.)

    asked by liz c

  437. Physics

    Mrs. jacobs drops an object from 10 meters, she knows it did 47 joules or work what is the mass of the object?

    asked by Anonymous

  438. science

    what is the natural process that causes rock to break down

    asked by kayla

  440. Science(pre-med)

    In pre-med we are making powerpoints about the anatomy and physiology of the cardiovasculary syemstem and the respiratory system!! So far I finished the cardiovasculary syestem and i am wondering is the Anatomy of a organ the structures that it is composed

    asked by Louisea

  441. English

    1.Another Chinese method of irrigation is shown in the lower picture. 2.In flat areas, water is pumped out of the ground. 3.Farmers build ridges around the terraces so that the terraces can be flooded during the growing season. 4.As you can see, water from

    asked by Clayton

  442. calculus

    find the points of discontinuity of the given function f(x) =x+3/|x2+3x|

    asked by pinki

  443. Business Law

    I need help answering a question: Sharissa is an American born Muslim girl whose family lives in Florida. Her parents arranged for her to marry into another Muslim family in Iran. She did not wish to get married, so Sharissa ran away to California. She now

    asked by tasha

  445. english

    in the book nectar in a sieve, what did rukumani's mother die from?

    asked by melisa barnett

  446. Microeconomics

    As part of their chores on Saturday mornings, they have to clean the bathrooms and wash the floors of the house while their parents go grocery shopping. In one hour’s time, Mike can clean two bathrooms or wash six floors. Linda, on the other hand, can

    asked by jill

  447. human resources

    during the past few years many firms have laid off thousands of workers, frozen employee pay and eliminated or reduced bonuses. Yet at the same time many of these firms have retained key employees and CEO's by giving them huge compensations increases. This

    asked by Anita

  448. Precalc

    In 1992, the average cost of a ticket on a privately-owned airline was $145. This amount has increased by approximately $51 yearly. How much should you expect to pay for a ticket on this airline in the year 2005?

    asked by sk

  450. us history

    I have to do an essay on how abortion has positively or negatively affected american politics over the past 50 years? Im having a hard time answering the question could you answer it for me, so that I could get a little insight on how i should go about

    asked by Adie Evans

  451. Physics

    Draw a graph to show the decay of 32g of plutonium-241. Use the graph to find the mass of plutonium-241 after 20 years.

    asked by Heena

  452. Spanish

    How do you write 2:30 in sentence form in Spanish? Please help! Thanks -MC

    asked by mysterychicken

  453. intermidiate algebra

    pick a car find its top speed. Asusuming that your chosen car reaches its top speed at the top of a ramp, leaving the ramp vertically 20 feet about the ground? 2. When would the car be traveling the fastest? 3.)When would the car be traveling the slowest?

    asked by linda

  455. English

    1.In the hills, the Chinese make flat terraces. Identify prepositional phrase then tell if adjective or adverb phrase 1.in the hills=adverb

    asked by Anonymous

  456. math

    Your favorite restaurant offers a total of 13 desserts, of which 11 have ice cream as a main ingredient and 9 have fruit as a main ingredient. Assuming that all of them have either ice cream or fruit or both as a main ingredient, how many have both?

    asked by liz c

  457. Human Resources

    1. How would you go about developing a performance management system for an organization consisting primarily of professionals (knowledge workers) who work primarily with concepts and ideas, such as analysts and software developers, rather than production

    asked by Young

  458. inter Algebra

    A band can sell 80 CDs at concert if they sell the Cds for $12 each. For every $1 increase in the price, they will sell 5 fewer Cds. Determine the price for a CD that will maximize the band's revenue.

    asked by linda

  460. probability

    In a study of Tibetan children, a total of 1546 children were examined. Of these, 1017 had rickets. Of the 245 urban children in the study, 94 had rickets. (a) How many children living in nonurban areas had rickets? 1Your answer is incorrect. (b) How many

    asked by liz c

  461. statistics

    The sample mean to be calculated from a random sample of size n= 4 from a population consists of eight measurements (2, 6, 9, 12, 25, 29, 39, 50) . find the sampling distribution of y .(Hint : there are 70 samples of size 4 when sampling from a population

    asked by koky

  462. math

    A full container holds 5/8 of a gallon of liquid. If the container is 4/5 full, how much liquid is in the conatainer? And the answer must be explained using words.

    asked by M

  463. calculus

    find a non-zero value for the constant "k" so that f(x) =tan(kx)/x, if x < 0 3x + 2k^2, if x> 0 will be continuous at x=0

    asked by pinki

  465. statistics

    Experts consider high serum cholesterol levels to be associated with an increased incidence of coronary heart disease .suppose that the logarithm of cholesterol levels for males in a given age bracket are normally distributed with mean of 2.35 and a

    asked by koky

  466. space

    what is the day and nigh time temp. on jupiter

    asked by mateo

  467. math

    A full container holds 5/8 of a gallon of liquid. If the container is 4/5 full, how much liquid is in the container? I need answer to problem and how you solved it using words for the explanation.

    asked by K

  468. Math

    There are 24 members in a comunity block association. Only 18 ot them came to their winter meeting. What percent of the members attended the meeting?

    asked by Michelle

  470. statistics

    The number of accidents per week at a hazardous intersection varies with mean 2.2 and standard deviation 1.4. a. What is the distribution of Xbar, the mean number of accidents in one year, (52 weeks)? {Note you do not have to use R for this question, write

    asked by cb

  471. physics

    an automobile moving at a constant velocity of 50 ft/sec passes a gasoline station. 3 sec later, another automobile leaves the gasoline station and accelerates at the constant rate of 6.5 ft/sec2. how soon will the second automobile overtake the first?

    asked by che_scarlet

  472. chemistry

    would the molar mass of a volatile liquid, calculated using the procedure in this experiment, be incorrectly high, incorrectly low, or unaffected by the following? You forgot to measure the volume of the flask, so you used the volume printed on the g=flask

    asked by thomas richards

  473. College Algebra

    Problem: Use Common or Natural Logarithims to solve the exponential equations symboliclly. 2e^7x+4=4 (Round to four decimal places) I tried solving this way 2e/2^7x+4=4/2 e^7x+4=2 ln e^7x+4=ln 2 7x+4=ln 2 7x+4-4=ln 2-4 7x=ln 2-4 7x/7=ln 2-4/7 x=ln 2-4/7

    asked by Lee

  475. More chemistry

    Hey jiskha. Microwave ovens emit microwave radiation that is absorbed by water. The absorbed radiation is converted to heat that is transferred to other components of the food. Suppose that the microwave radiation has a wavelength of 12.7 cm. How many

    asked by Alex

  476. soc101

    Of the different forms of social structure described by Durkheim, Tonnies, and Lenski, which comes closest to matching your social setting? Use the following terms in your explanation: status, role, primary group, and secondary group.

    asked by yolanda

  477. physics

    An arrow is shot horizontally off a 100 m high building. A target is dangled from a rope 204 m away. How far off the ground do you have to dangle the target from the arrow to hit it?

    asked by Jennifer

  478. physics

    An elevator (mass 4175 kg) is to be designed so that the maximum acceleration is 0.0700g. What is the maximum force the motor should exert on the supporting cable? What is the minimum?

    asked by Meghan

  480. Physics

    Does an object moving in a circle obey the law of inertia? Which way would it move if there were no net force on it?

    asked by Jen

  481. Chemistry

    Suppose a student is measuring the optical rotation of a 1 M sample of (S)-(-)- Limonene. The path length is 13cm. What optical rotation should the student expect to measure?

    asked by Sunny

  482. physics

    A person stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.71 of the person's regular weight. Calculate the acceleration of the elevator, and find the direction of acceleration.

    asked by Meghan

  483. physics

    A material of unknown composition with an initial length of 2.9 m is found to expand by 0.37 mm when it is heated by 15 K. What is the coefficient of thermal expansion of this material? K-1

    asked by Rayler

  485. physics

    A person jumps from the roof of a house 4.9 m high. When he strikes the ground below, he bends his knees so that his torso decelerates over an approximate distance of 0.70 m. The mass of his torso (excluding legs) is 46 kg. (a) Find his velocity just

    asked by Hannah

  486. physics

    If the coefficient of kinetic friction between a 37 kg crate and the floor is 0.31, what horizontal force is required to move the crate at a steady speed across the floor? What horizontal force is required if µk is zero?

    asked by Hannah

  487. geometry

    Two parallel chords lie on opposite sides of the centre of a circle of radius 13cm.their lengths are 10cm and 24cm.what is the distance between the chords?

    asked by Justice

  488. 11 grade physics

    A force of 23.0 N is required to start a 3.0 kg box moving across a horizontal concrete floor. (a) What is the coefficient of static friction between the box and the floor? 1 (b) If the 23.0 N force continues, the box accelerates at 0.50 m/s2. What is the

    asked by Cameron
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