Questions Asked on
December 9, 2010

  1. math

    Andy had 20% fewer marbles than Henry. When Andy gave 80 marbles to Henry, the numbers of marbles he had left was half of what Henry had. How many marbles did Andy have in the begining? Please help me

  2. Chemistry

    All of the following are postulates of the kinetic molecular theory of gases except A. The gas molecules are in constant motion. B. The gas molecules are in rapid motion. C. The collisions between molecules are elastic. D. At a constant temperature, each

  3. Chemistry

    Which of the following compounds has the highest vapor pressure at 25°C? A. CH3CH2OH B. CH3OCH3 C. CH3CH2CH2Cl D. CH3CH2CH3 E. CH3CH2CH2CH

  4. Physics

    The front 1.20 m of a 1550 kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision. (a) If a car traveling 26.0 m/s stops uniformly in 1.20 m, how long does the collision last? cannot_evaluate s (b) What is the magnitude of

  5. math

    how to find the four geometric means between 5 and 1215

  6. Chemistry.

    Urea: (NH2)2CO 1. Which bonds in the molecule are polar and which are nonpolar? 2. What is the most polar bond in the molecule?

  7. chemistry

    The strongest intermolecular forces present in a sample of pure I2 are A. covalent bonds. B. covalent network bonds. C. metallic bonds. D. dipole–dipole forces. E. London forces.

  8. geometry

    find the area of a regular hexagon with the side length 4m. round to the nearest tenth

  9. algebra 1

    what kind of shoes does a frog wear

  10. chemistry

    In 24 g of a 7.8% by mass solution of CaSO4? How many grams of solute are present gCaSO4? how many grams of solvent are present g solvent?

  11. Chemistry

    Calculate the molarity of the following solutions: 5.0g of KOH in 4.0L of KOH solution I went from grams of KOH to moles of KOH to molarity but still got the wrong answer... 5.0g KOH X 1 mol KOH/56.108g KOH = 5.0 mol KOH/56.108=0.0891 mol KOH/4.0L and got

  12. Chemistry

    OK I just need help with two final problems that I am stuck on: The problem states the calcium carbonate in limestone reacts with HCl to produce a calcium chloride solution and carbon dioxide gas CaCO3(s)+2HCl(aq)-->CaCl2(aq)+H2O(l)+CO2(g) 1)Find how many

  13. chemistry

    In the following equation, which species is the oxidizing agent? KCLO3 --> KCL + KCLO4 In the same are, How do you know that Cu is the reducing agent in this equation: AgNO3 + Cu ---> Cu(NO3)2 + Ag

  14. math

    Consider a parabola P that is congruent to y=x^2, opens upward,and has its vertex at (2,-4). Now find the equation of a new parabola that results if P is: A. stretched vertically by a factor of 5. B. compressed by a factor of 2. C. translated 2 units to

  15. Math

    Replace A,B,C with numbers so that: A*A=B B-A=C A+A=C

  16. Algebra

    Elena bicycles 5km/h faster than Dennis. In the same time it takes Dennis to bicycle 57 km, Elena can bicycle 72 km. How fast does each bicyclist travel. There was another variation I looked at of this, but the person who answered did not answer well

  17. college

    Write as a single log : 3log2+2log8- 1/2 log4 ( simplify your answer) Ans

  18. chemistry

    Calculate the Gibbs free energy change for the reaction below when initial concentrations of CR3+ and Cu2+ are 1 M (F= 96500 J/V mole e-) 2Cr3+ (aq) + 3Cu (s) --> 2Cr (s) + 3Cu2+ (aq) I assume we use the deltaG= -nFE equation, but how do you know n when Cr

  19. Math/Fractions

    Tanisha has 2 new kittens. Together they weigh 3 5/8 pounds. If the male kitten weighs 5/8 pound more than the female kitten, how much does the male kitten weigh?

  20. Physics

    A 0.075 kg ball in a kinetic sculpture moves at a constant speed along a motorized conveyor belt. The ball rises 1.32 m above the ground. A constant frictional force of 0.350 N acts in the direction opposite the conveyor belt's motion. What is the net work

  21. Geometry Please Help

    Given: QS bisects ∠RQT; ∠R ≅ ∠ T Prove: SQ bisects ∠RST /Users/szeringue/Documents/triangle.doc

  22. Physics

    During the pre-industrial era, what were the Carbon Dioxide levels like?

  23. History

    1. As industry spread, the British and German governments initiated reforms to improve workers’ lives. What motivated Bismarck to enact reforms in Germany? What kinds of reforms were enacted in Germany and Britain? 2. 2. Write a brief, well-organized

  24. Physics

    The length of a simple pendulum is 0.58 m, the pendulum bob has a mass of 285 g, and it is released at an angle of 16 degrees to the vertical. With what frequency does it oscillate?

  25. geomertry

    Find the range of possible values for x 3x-5 27

  26. chemistry

    a cell is constructed by immersing a strip of silver in .10 M AgNO3 solution and a strip of lead in 1.0 M Pb(NO3)2 solution. A wire and salt bridge complete the cell. What is the potential of the silver electrode in the cell?

  27. science

    which of the following are not examples of centripetal acceleration

  28. Finance

    A company requires the amount of $1,000,000 in 25 years to retire a bond issue. Assume they can earn 5 3/4% interest compounded daily. What amount would they have to pay quarterly to be able to retire this debt in 25 years?

  29. Finance

    The extent to which inventory financing may be used depends on

  30. chemistry

    After writing a balanced equation for the reaction between magnesium and hydrochloric acid, calculate the mass of magnesium needed to produce 90ml of hydrogen gas @ STP conditions.

  31. chem

    Calculate the number of liters of hydrogen, measured at STP, that can be produced from the reaction of 0.155 mol of aluminum according to the following unbalanced chemical reaction equation. i got .193 L of H2 but it was wrong. i only have one submition

  32. Math

    A math teacher drove by a playground that was full of boys and dogs.The teacher notice there were a total of 40 heads and 100 feet. Hom many boys and how many dogs were there?

  33. 12th grade

    Objects on the moon's surface have an acceleration due to gravity one-sixth that on the earth's. What would the 40 kg boy weigh on the moon? (Round answer to nearest tenth.)

  34. Math

    Exprees each series using sigma notation. 3+6+9+12+15

  35. history

    Why did the Supreme Court rule that segregation was constitutional?

  36. com 155 review

    I am supposed to provide five examples of how the reviewer of the movie Burlesque used adverbs and five examples of the use of adjectives. I also need to decide if they used them effectively, why or why not. (yes, I know the last question I will have to

  37. Chemistry

    When a 1.350g sample of element X is heated in a stream of chlorine gas 6.67g of XCl3 are formed.1.) What(write) is a balance equation for the reaction using 'X' for the element? 2.) Calculate the atomic weight of X. 3.)What mass of X is left unreacted?

  38. Precalculus

    Having trouble with this: Verify: csc^4x-cot^4x=2csc^2x-1 *the numbers after the carets are to the power of

  39. Physics

    A mass-on-a-spring system has a spring constant k = 384 N/m and a mass m = 0.51 kg. (a) If it is given an initial displacement of 0.22 m and then released, what is the initial potential energy of the oscillator? = 9.29 J (b) What is the maximum kinetic

  40. Chemistry

    A sample of phosphorus of mass 3.654 g reacts with dichlorine to form 16.20 g of a molecular compound. What is the empirical formula of this compound?

  41. physics

    Jason takes off across level water on his jet-powered skis. The combined mass of Jason and skis is 75 kg (the mass of the fuel is negligible). The skis have a thrust of 200 N and a coefficient of kinetic friction on water of 0.1. Unfortunately, the skis

  42. physics

    A 59 kg diver stands at the end of a 32 kg springboard, the spring board is 3 m long. The board is attached to a hinge at the left end, but simply rests on the right support which is half way along the board. What is the magnitude of the vertical force

  43. hsi135

    After Nixon resigned from office, President Ford became President of the United States. One September 8, 1974, President Ford offered Nixon a presidential pardon for his crimes. He stated in his pardon that “It is believed that a trial of Richard Nixon,

  44. Chemistry

    I need help with this problem please Calculate the amount of reagents you take to prepare 200 g of 9.0% (m/m) glucose solution? I already found the mass of the glucose which was part one and got 18.0 g of glucose. Now they want the mass of water and I am

  45. culinary arts

    how do you make a budget for culinary if you don't have a figure amount to start out with?

  46. Genetics

    Need help figure out the order of GENES. Okey here is the info Bacterial cells of genotype pur- pro+ his+ were transduce with P1 bacteriophage grown on bacteria of genotype pur+ pro- his-. Transductants containing pur+ were selected and tested for the

  47. math

    Write the relation for a parabola that satisfies each condition: The graph of y=x^2 is stretched vertically by a factor of 3/2, then translated left 4 units.

  48. calculus

    a particle moves along the x-axis in such a way that its acceleration at any time t is given by a(t)= 6t - 18. At time t = 0, the velocity v(t) = 24. and at time t = 1, the position x(t) = 20 i have to find the expression for the velocity and what values t

  49. math

    What value oc C makes the expression a perfect square? A. x^2+bx+c B. x^2+0.16x+c

  50. Business

    Based on this financial info where a company's Beta Year = 2008, the Company's commons stock = 0.85, the Risk-Free Rate of Return = 5%, and the Market Risk Premium = 6%. Use the dividend growth model to calculate the Company's Common Stock in 2008. Stock 1

  51. math

    The cosat C, in dollars, of operating a concrete-cutting machine is modelled by C=2.2n^2-66n+655, where n is the number of minutes the machine is run. How long must trhe machine run for the operating cost to be at a minimum? What is the4 minimum cost?

  52. Math

    A bag holds 8 yellow marbles and 5 orange marbles. How many and what color marbles would you add to the bag so that the probability of picking a yellow marble is 2/3?

  53. physics

    when Chris slams a basketball he has a vertical leap of 1.46 meters. what must his initial vertical velocity be in order for him to reach this height?

  54. Chemistry

    When a 1.350g sample of element X is heated in a stream of chlorine gas 6.67g of XCl3 are formed.1.) What(write) is a balance equation for the reaction using 'X' for the element? 2.) Calculate the atomic weight of X. 3.)What mass of X is left unreacted?

  55. trig

    find the exact value of cos 3.14/8

  56. mechanics

    Two planets, X and Y , travel counterclockwise in circular orbits about a star, as shown in figure below. The radii of their orbits are in the ratio 3 : 1. At some time, they are aligned as in the figure, making a straight line with the star. During the

  57. Chemistry

    The normal boiling point of a liquid is A. the temperature at which all three phases are in equilibrium. B. the only temperature at which there can be equilibrium between the liquid and gas states. C. the temperature at which the vapor pressure equals 760

  58. biochemistry

    I have three questions. I don't even know where to begin. 1. a) If an in vitro fatty acid synthesizing system is supplied with [2-14C]-acetyl CoA as the only source of radioactive label along with all other necessary cofactors/reactants for net fatty acid

  59. 8th grade

    An alloy of metals is 25% copper .Another alloy is 50% copper. How much of each alloy should be used to make 1000grams of an alloy that is 45% copper?

  60. Math

    Explain how to find 14 x 19 by breaking apart the factors into tens and ones and finding the sum of the four partial products

  61. Algebra one story problem help please.

    in 1993, 2.00 Million females particpaited in U.S Highschool sports, by 2003, the number increased to 2.86 Mill. A) Write an equation in slope-intercept form that gives the number of females participaiting in US. highschool sports, ( in Millions) as a

  62. English

    1.The clowns and jugglers (has, have) always been my favorite performers. 2.Neither pencils nor an eraser (are, is) permitted. 3.All of the boats in the harbor (belong, belongs) to the village. 4.Either the wall clock or our wristwatches (tell, tells) the

  63. college math/chemistry

    chemical reaction: E + S E~S E-S indicates a bidirectional reaction with different forward and backward rate constants. we can call these k1, k2, k3 and k4 in the above equation. Here, the enzyme binds to the substrate; the initial complex E~S then

  64. physics

    A bullet fired vertically upwards from a gun held 2m above the ground reaches its maximum height in 4sec, calculate its initial velocity and the total distance the bullet travels by the time it hits the ground

  65. physics

    When a player's finger presses a guitar string down onto a fret, the length of the vibrating portion of the string is shortened, thereby increasing the string's fundamental frequency. The string's tension and mass per unit length remain unchanged. If the

  66. Physics

    Hi I really need this question answer as a check: a helicopter holding a 70 kilogram package suspended from a rope 5.0 meters long accelerates upward at a rate of 5.2 m/s^2. a. Determine tension on the rope. b. When the upward velocity of the helicopter is

  67. need help

    I have this equation y+x=-7 I have to graph my answers to find out what my y is. I have tried everything, and I cannot get my points to cross. Any help would be great.

  68. Chemistry. Help please

    Calculate the pH of a buffer solution made by mixing 174 mL of a 1.68M trimethylamine (CH3)3N solution with 250 mL of a 1.08M trimethylammonia chloride, (CH3)3NHCl solution.

  69. Chemistry

    a 2.4375 g sample containing a mixture of KClO3 + NaCl is heated and undergoes a mass loss of 0.6191g. What percent of KClO3 is in the mixture?

  70. Chemistry

    a 2.4375 g sample containing a mixture of KClO3 + NaCl is heated and undergoes a mass loss of 0.6191g. What percent of KClO3 is in the mixture?

  71. Law

    For a cross examination, can you question a witness about someone else's testimony?

  72. math

    how do i divide 2/5 of an acre into 3 parts

  73. Science

    Light is shone on a metal and photoelectrons are emitted, what are the three things which might cause the photoelectron emission to stop

  74. Physics

    1. A fisherman's scale stretches 3.6 cm when a 2.5-kg fish hangs from it. What will be the frequency of oscillation if the fish is pulled down 2.7 cm more and released so that it oscillates up and down? 2. Two trains emit 518 Hz whistles. One train is

  75. English

    How can we understand the complicated relationship between the Indians and Nick, and his father and Uncle George in Indian Camp by Ernest Hemingway? I included how uncle george calls the indian woman by an offending name, but I'm trying to see if there are

  76. math(7th)

    Can someone PLEASE help me:{ I never understand math. I always have a B in this class. ow do I find the unit rate of $11.49 for 3 packages?? I have to round ti the nearest hundredth if necessary.... :) thank ya!!!

  77. Math

    A process for producing electronic circuits has achieved very high yield levels. An average of only 10 defective parts per million is currently produced. 1. What are the upper and lower control limits for a sample size of 100? 2. Recompute the upper and

  78. Nuclear Physics

    If humans produce a 10mm wavelengh, what is their frequency? Find the energy emitted from humans off of the wavelength given.

  79. math

    what is the simplest form for the fraction 130 over 220

  80. 6th grade

    I asked one of the guards a question then iI relized he was made of wax! I need help on where to put the semicolons and colons

  81. Math

    28/100 = x/360 x=

  82. math

    a can of soda weighs 336 grams. find the weight in kilograms

  83. Geometry Please Help

    Given: QS bisects ∠RQT; ∠R ≅ ∠ T Prove: SQ bisects ∠RST

  84. Geometry

    Given:JG/HG =KG/IG, ∠1 ≅∠2 Prove: EF ll HI /Users/szeringue/Documents/#6.doc

  85. Human Service

    Where can I find the names of Cognitive Disease I have checked the library, most popular search engines There are 3 diseases Please help

  86. grammar

    can you help me in semicolons, colon snd commas

  87. statistics

    give three characteristics of r

  88. Math

    Hello I am trying to solve this, and can not figure it out: Can you help? f(b+9) Thanks,

  89. geometry

    E And C are mid points od line AD and line DB; line AD is congruent to line DB and angle A is congruent to angle 1. What do you do to prove that ABCE is a isosceles trapezod ??

  90. geometry

    E And C are mid points od line AD and line DB; line AD is congruent to line DB and angle A is congruent to angle 1. What do you do to prove that ABCE is a isosceles trapezod ??

  91. math

    what multiplication fact could you use to find a number that can be divided evenly by 8 and by 9

  92. geometry

    E And C are mid points od line AD and line DB; line AD is congruent to line DB and angle A is congruent to angle 1. What do you do to prove that ABCE is a isosceles trapezod ??

  93. physics

    what happens if the cars on the roller coaster has too slow speed?

  94. Algebra uno, help please(:

    Between 1990 and 2000, the number of thousand vists by people to hawaii volcanoes national park increased by about 43.1 thousand visits per year. in 2000 there were about 1529.6 thousands visits to the park. Write an equation in slope-intercept form that

  95. calculus

    construct an isoceles triangle with an area of 100. what is the length of the base of the triangle which has the smallest perimeter? Prepping for a test, explanations please

  96. accounting

    which of the following is never considered in incremental analysis? a. incremental revenue b.sunk cost c.incremental profit d. differential costs

  97. coding

    If a patient suffers multiple burns, describe the correct coding sequence.

  98. math

    solve the equation for b. -12.27-0.9b=5.6(b+2.8)

  99. Math

    Find the standard deviation for the given data. Round your answer to one more decimal place than the original data. 2, 5, 47, 11, 13, 48, 39, 36

  100. Math

    Dina earned 1/4 for baby sitting and 1/2 for washing the dishes. How much money did she NOT earn from $25.00?

  101. Chemistry

    I am having trouble getting this starting and figuring out the correct steps...the problem is Calculate the final concentration of the solution in each question 1) Water is added to 0.270 L of a 6.00M HCl solution to give a volume of 3.00 L (Express

  102. math

    subtracting fractions with different denominators. Change answer to simplest form: 3/9 - 1/4

  103. Not a school subject. its for a contest.

    HELP!!! I HAVE NO IDEA WHY I WANT TO BE MISS VFW EXCEPT I CARE FOR THE TROOPS AND I HAVE FRIENDS IN THE ARMY.

  104. Math

    A population is 200 in the year 1825, 252 in 1850, and 318 in 1875. What is the p(t) equation? I see that the population increases 26% over each 25-year period but I can't figure out the equation.

  105. 7th grade

    I am doing a battle chart in history class the I need to know who won the Gonzales battle Also i need the mexican leader and the texas leader and who won on in the battle of the concepcion and where the goliad battle took place and when it took place also

  106. History

    Can you please find any documents (pictures, quotes, info) for the following question: Compare and contrast the economy and politics that impacted the global economy of Europe during the Middle Ages and the Renaissance. Thank You

  107. math

    break apart these numbers 40x16

  108. Ap American Lit

    hi i need help making literary 3x3 cards for Jane Eyre chapters 1-10 does any one have good ideas?

  109. physics. please help

    A worker pushes a 820 N crate with a horizontal force of 345 N a distance of 24 m. Assume the coefficient of kinetic frictin between the crate and the floor is 0.22. a) How much work is done by the worker on the crate? b) How much work is done by the

  110. Geometry

    Maggie claims that to make the measure of an angle greater, you just extend the rays. How do you respond?

  111. English

    1. They had a sleepover at Susan's house yesterday. (Is 'sleepover' popular among teenagers in the United states?)

  112. statistics

    As a marketing analyst for Imperial Products, your task is to determine if a new product is worth marketing nationwide. The director of marketing has stated that at least 85percent of the public must express some desire for the product and, for those who

  113. calculus

    Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y=4 x^2, x = 1, y = 0, about the x-axis

  114. English

    A: Hello, may I speak to Andy? B: Sorry, he's out. ______, please? A: This is Harry Simpson. 1. Who calls 2. Who's calling 3. Who is this (Which expressions can be put in the blank? Is #1 correct? Can we use some other expressions? I think #2 and #3 are

  115. Chemistry

    A 5.00 gram mixture of CaO and CaO3 is heated strongly. After heating, the mixture it has a mass of 4.00 grams. What % of the original mixture is CaCo3?

  116. Physics

    Consider the resonant frequencies of a 1.78 m tube closed at one end at 24°C. a) Lowest resonant frequency = Hz HELP: You know the length of the tube. What else do you need in order to calculate the frequency of the lowest resonance of a tube that's

  117. math 5thgrade

    80% of 30 answers were correct write 80% as a reduced fraction? would it be 2 2/3?

  118. Physics

    A hydraulic lift consists of a platform that is supported by a cylindrical piston, which resides in a tube connected to a reservoir of hydraulic fluid. The piston and platform have a mass of 300 kg. The input force is generated at a smaller piston

  119. math

    How do you square a fraction like 4/3 squared?

  120. chemistry need help plzzz tomorrow is a TEST!!!

    phosphoric acid is the active ingredient in many commercial rust-removing solution.calculate the volume of concentrated phosphoric acid (14.6 mol/L)that must be diluted to prepare 500mL of a 1.25 mol/L solution. how can i calulate the volume cocentration

  121. Statistics

    Given a population with a normal distribution, a mean of 100, and a standard deviation of 1, what value has an area of .1234 to its right?

  122. math

    what multiplication facts can be found using the arrays 2*9 and 5*9?

  123. English

    1. We had to cook the turkey for six hours. 2. We had to cook the turkey in six hours. 3. We had to cook the turkey until six hours. 4. We had to cook the turkey from six hours. 5. We had to cook the turkey after six hours. (#1 is right? What about the

  124. Physics

    A satellite has a mass of 101 kg and is located at 1.99x10^6 m above Earth's surface. (a) What is the potential energy of the satellite at this location? (b) What is the magnitude of the gravitational force on the satellite? for potential energy, I was

  125. Physics

    A light string, connects blocks 1 and 2 of masses m1 and m2. These blocks are further connected to a block of mass M by another light string that passes over a pulley of negligible mass and friction. Blocks 1 and 2 move with a constant velocity v down the

  126. java programming

    Enhance bank account class by adding preconditions for the constructor and the deposit method that require the amount parameter to be atleast zero, and a precondition for the withdraw method that requires amount to be a value between 0 and the current

  127. physics

    A 13.5 m long wire of mass 173 g is stretched under a tension of 269 N. A pulse is generated at one end, and 16.5 ms later a second pulse is generated at the opposite end. Where will the two pulses first meet?

  128. algebra

    To write the initial equation of a straight line 6x - 5y - 4z + 8 = 0.6x + 5y + 3z +4 = 0

  129. MATHS

    -12.27-0.9b=5.6(b+2.8) -12.27 - 0.9b = 4.6b + 15.68 15.68 - 12.27 = 4.6b + 0.9b 3.41 = 5.5b 3.41/5.5 = b ? = b

  130. Physics

    What would the volume of commercial butane be equal to given an air flow of 0.6 cubic metres/hr?

  131. Chemistry

    A protein found in some types of wood-rotting fungi is 0.40% copper by mass. Each protein molecule is known to contain 4 copper atoms. What is the approximate molecular weight of thos compound?

  132. engineering science

    The power in a resistor RLOAD of 10 Ω when connected to a 100 volt supply is measured using a voltmeter and ammeter. There are two possible ways of connecting the meters as shown in FIGURE 2. The resistances RA and RV represent the internal resistances of

  133. algebra

    The function H described by H(x)=2.75x+71.48 can be used to predict the height in centimeters of a woman whose humerus is x centimeters long what is the height of a woman whose humerus is 35 centimeters long?

  134. English

    1. Mom had to check the timer every 10 minutes. 2. Mom had to check the timer every 10th minute. (Can we use both expressions?) 3. How about going at 6:00 at the art center. 4. How about coming at 6:00 at the art center. 5. How about arriving at 6:00 at

  135. inflection points

    How can I find the number of points of inflection for a function whose second derivative is .5 + cosx - e^-x on the interval x is greater than or equal to 0 and less than or equal to 20?

  136. high school/vocabulary studies

    In which year did pocahontas die? A. 1542 b. 1617 c. 1668 d. 1710

  137. math

    Andy had 20% fewer marbles than Henry. When Andy gave 80 marbles to Henry, the numbers of marbles he had left was half of what Henry had. How many marbles did Andy have in the begining? Please help me

  138. physics

    If two marbles having mass of 27.7 grams and of 3.6 grams have stuck together where do they land and how much kinetic energy would be lost ?

  139. business

    Which three areas do you believe to be most prevalent, or which three areas have the greatest consequence in the workplace?

  140. Algebra

    The equation y=-1777x+27,153 can used to predict the number of y gun deaths in the United States x years after 2000 that is x=0 corresponds to 2000, x=3 corresponds to 2003, x=6 corresponds to 2006, and so on. Predict the number of gun deaths in 2006 and

  141. 4th grade

    do u know how to bulid the alamo ?well me nither so lets find out

  142. Math

    Translate: The product of 16% and some number?

  143. math

    an old tv is 27 inches the new tv is 42 inches.... how much bigger is the new tv that the old tv...if the odl tv has 27 inches and the new tv has 42 inches

  144. science

    what is the meaning of particels and solutions

  145. algebra

    Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling at 60 mph and train B at 63 mph. Train A passes a station at 11:10 AM. If train B passes the same station at 11:40 AM, at what time will train B catch up to train

  146. math

    80% of 30 questions were correct, write 80% as a reduced fraction would it be 2 2/3

  147. science

    ive been trying to find a report for 5th grade greenhouse effect science. how can i type it to find it?

  148. 8th grade

    When a truck pulls a trailer, the trailer and truck accelerate forward even though the action and reaction forces are the same size but are going in opposite directions. Why don't these forces balance each other out?

  149. Physics

    What is the amount of CO2 added to the earth's atmosphere each year from fossil fuels?

  150. algebra

    what is this mean n-7=2

  151. math

    Monique is using similar triangles in her graphic-design project. The triangles are isosceles. One has a base of 5 inches and legs of 7.5 inches. If the other triangle has a base of 14 inches, how long are the legs?

  152. spanish

    how do you say history in spanish

  153. math

    bayside insurance offers two health plans. under plan A, giselle would have to pay the first 160 of her medical bills, plus 25% of the rest. under plan B, giselle would have to pay the first 180, but only 20% of the rest. for what amount of medical bills

  154. Calculus

    I have a cone and water is leaking from it at a rate of sqrtV*-2 how do i find out how long it takes

  155. math

    drawing a black checker from a bag of 9 black checkers and 6 red checkers, replacing it, and drawing a red checker

  156. Physics ( check answers)

    Question 1 A 0.50 kg football is thrown with a velocity of 15 m/s to the right. A stationary receiver catches the ball and brings it to rest in 0.020s . What is the force exerted on the receiver? So I used mvf-mvi/change(t) I got 375 for that one...

  157. Math

    11/14 x 7/12

  158. Modern World Studies

    1. As industry spread, the British and German governments initiated reforms to improve workers’ lives. What motivated Bismarck to enact reforms in Germany? What kinds of reforms were enacted in Germany and Britain? Please give me information that answers

  159. Foreign Language - Latin

    This week we learned the phrase, amicus curiae, meaning friend of the court. A friend of the court is an expert who comes into the court and gives background information that the court may need for the case. The person is not involved in the case in any

  160. 5th grade

    how to do a double line graph with 2 superbowl teams scores with their mode median,and range for the first seven games. this is so hard for fifth grade. i need help

  161. Chemistry HELP

    40.0 mL of 0.1880 M formic acid is titrated with 30.0 mL of 0.2010 M NaOH. Pka of formic acid is 3.8. What is the pH of the titration?

  162. physics

    I need help finding an equation for: an asteroid revolves around the sun with a mean orbital radius twice that of Earth's. Predict the period of the asteroid in Earth years. Thank you.

  163. english gramar

    oll noun question with santenc

  164. geometry

    in triangle GHJ, K(2,3) is the midpoint of GH, L(4,1) is the midpoint of HJ, M(6,2) is the midpoint of GJ. Find the coordinates of G, H, and J.

  165. math

    napoleon 1 was born in 1769 how old was he when he was crowned in france 1804 {equation]

  166. physics

    why is static friction bigger than kinetic friction

  167. Geometry

    1. Explain whether the following statement is a valid definition: “A 150° angle is an obtuse angle.” Use the converse, biconditional, and at least one Euler diagram to support your answer. 2. Explain the purposes of inductive and deductive reasoning

  168. Physics

    forces of 185N and 245N act east and south respectively on an 80 kg mass.If the force of friction is ZERO , find the accleration of the mass.

  169. Calculus

    Find the volume of the solid formed by rotating the region enclosed by x=0, \ x=1, \ y=0, \ y= 8 +x^{2} about the x-axis.

  170. spanish

    what does las uno voy a la clase ciencia means?

  171. math

    if a person drove 364 miles in 7 hours how many miles did they drive in 1 hour

  172. physics

    A cylinder with a moveable piston holds 3.00 of argon at a constant temperature of 300 . As the gas is compressed isothermally, its pressure increases from 101 to 125 .Find the final volume of the gas.Find the work done by the gas.Find the heat added to

  173. History

    1. As industry spread, the British and German governments initiated reforms to improve workers’ lives. What motivated Bismarck to enact reforms in Germany? What kinds of reforms were enacted in Germany and Britain? Please give me information that answers

  174. physicss

    The question states: A 5.2 kg box is on a frictionless 36 degree slope and is connected via a massless string over a massless, frictionless pulley to a hanging 2.1 kg weight. What is the tension in the string if the 5.2 kg box is held in place, so that it

  175. Spanish

    40. Me gustaría ver ______ profesor de español después de la clase. a. a mí b. a mi c. mi d. señor C? Either that or B, I think... 41. Los estudiantes no tienen mucha tarea hoy. ______ ir al campo. a. Piensan b. Pensamos c. pienso d. piensas B? 42.

  176. geometry

    Find X if B is the midpoint of AC, AB=18 and AC=10x-4

  177. physics

    If 8.00 moles of a monatomic ideal gas at a temperature of 260 are expanded isothermally from a volume of 1.08 to a volume of 4.14 .Calculate the work done by the gas.Calculate the heat flow into or out of the gas.If the number of moles is doubled, by what

  178. calc

    construct an isoceles triangle with an area of 100. what is the length of the base of the triangle which has the smallest perimeter? Prepping for a test, explanations please

  179. Chemistry

    The odor of pineapple is due to the compound ethyl butyrate, which contains hydrogen, carbon, and oxygen. When 3.70g of ethyl butyrate are burned, 8.41g of carbon dioxide and 3.43g of water are the only products. Determine the empirical formula of ethyl

  180. MATH

    HOW DO YOU DO INPUT & OUTPUT DIVISION Tables

  181. 4th grade

    What is the greatest and least possible product you can make using the digits 1,3,5,6 and 7 in the multiplication problem below? Use each digit only once, _ _ _ X _ _ = ?

  182. English

    I have a few last doubts. Thank yo very much for your corrections. 1)The narrator can tell a story using a first- or a third-person. An internal narrator tells of his own personality. (or tells about?) 2) The story deals with (and not tells about) a family

  183. algebra

    11) The Half-Life of Tylenol is approximately 3 hours. If you take 1000mg, how Tylenol much is left in your body after 4 hours?

  184. Calc

    Solve the equation for x. arcsin(sq. rt.(2x)) = arccos(sq. rt(x))

  185. Precalculus

    Doing some test corrections and not seeing this....Please help: Verify. csc^4x - cot^4x = 2csc^2x-1

  186. math

    what is 93,042-54,878: what is 153,911-68,099; what is 49,499*5; what is 61,711-30,490; what is 29,038*72; what is 22,675*30

  187. economics 212

    Compare and contrast market systems and the role of an economist within these systems.

  188. economics

    charts for micro economics and macro economics

  189. chem

    Calculate the number of grams of magnesium nitride necessary to produce 2.02 L of ammonia gas at STP. I got 4.55g for the upper question which is correct but idk how to do the bottom one: How many moles of magnesium hydroxide can also be formed? Mg3N2(s) +

  190. Calc

    Verify each identity. a) arcsin(-x) = -arcsin x; abs. val. (x) is less than or equal to 1. b) arccos(-x) = pi - arccos x; abs. val. (x) is less than or equal to 1.

  191. economics

    charts for positive and normative study

  192. English

    1.The new magazines on the kitchen table (are, is) for the hospital waiting room. 2.My list of favorite paintings (include, includes) Starry Night and the Mona Lisa. 3.You and your cousins (are, is) invited to the party. 4.His mother (teach, teaches) math.

  193. economics

    charts for inductive and deductive study

  194. Math help

    A corporation has 30 shareholders holding 2900 shares. The founder of the company retains 50 % of the companies shares. The remaining shares are equally divided among his 29 grandchildren. By the company's articles of incorporation, the voting weight for

  195. Geography

    What is nomadic herding?

  196. physics

    a motor turns 21.6 revolutions in 0.75 second. what is the angular speed of the motor in rpm? in radians per second?

  197. physics

    A 10 kg block slides up a hill to a height of 5.8 m. If 414 J of thermal energy are generated, how fast was the block going at the bottom of the hill? 1 m/s

  198. chemistry

    2 NO(g) + 1 O2(g) 2 NO2(g)

  199. economics

    charts for cardinal and ordinal utility

  200. Math hw

    A corporation has 24 shareholders holding 4140 shares. The founder of the company retains 50 % of the companies shares. The remaining shares are equally divided among his 23 grandchildren. By the company's articles of incorporation, the voting weight for

  201. Math help

    Losing your bags during airline travel is not all that uncommon. Recently, an airline was cited for losing customers' baggage 8% of the time. A test is conducted by randomly selecting 20 customers for that airline and observing whether they had lost their

  202. economics

    chjarts for economic and non economic activities

  203. college

    What are the pros and cons of matching clients and clinicians in terms of gender, ethnicity, disability, sexual orientation, or language? Does matching people along those lines ensure common experience and easy bonding?

  204. Physics

    What is the momentum of a two-particle sys- tem composed of a 1300 kg car moving east at 60 m/s and a second 1500 kg car moving west at 95 m/s? Let east be the positive direction. Answer in units of kg · m/s.

  205. Physics

    Consider the motion of a projectile. It isfired at t = 0. Its initial speed is 36 m/s and its initial projection angle is 55◦ from the horizontal. The acceleration of gravity is 9.8 m/s2 . y x What is the maximum height, h, of its tra jectory? Answer in

  206. physics

    Two freight cars, each with a mass of 3.9 105 kg, collide and stick together. One was initially moving at 3.2 m/s and the other was at rest. What is their final speed in m/s?

  207. Calculus

    The base of a certain solid is the triangle with vertices at (-10,5), (5,5), and the origin. Cross-sections perpendicular to the y-axis are squares.

  208. economics

    charts for economic and non economic activities

  209. physics

    A block slides down a frictionless ramp. If the ramp angle is 22 degrees and the length of it is 25m. find the speed of the block as it reaches the end of the ramp, assuming it started sliding from rest at the top.

  210. Business

    Fice companies contributed different amounts to a local charity. Which visual could best illustrate the percentage of all the monies collected that each company's contributed repreented? table bar chart line graph pie chart

  211. science

    This isn't a homework/quiz question, Well I guess it is homework, But I need to find out three types of friction in a machine I just built, but I don't know any types of friction. So I was wondering if someone could list the types and explain what they

  212. geometry

    In triangle DEF, A(2,3) is the midpoint of DE, B(4,1) is the midpoint of EF, and C(6,2) is the midpoint of DF. What are the coordinates of D, E, and F?

  213. math

    Andy had 20% fewer marbles than Henry. When Andy gave 80 marbles to Henry, the numbers of marbles he had left was half of what Henry had. How many marbles did Andy have in the begining? Please help me

  214. English

    Thank you very much! A very last thing. The story deals with (a family..) ... is incorrect? The novel deals with/tells about ... are they both possible?

  215. Math

    Prove this identity. State any restrictions on the variables. sin x/(tan x)= cos x

  216. 5 th math

    what is 1/8= ? Equivalent fraction THIS IS WHAT I GOT ? = 2/16 ,4/32 AND 8/40. CAN YOU PLEASE! CHECK IT FOR ME MS. SUE THANKS!!

  217. 6th grade

    What steps do we use to change 1-1/2 cups in half?

  218. 7th grade

    what were the steps on mendels experiments with pea plants?

  219. algebra

    a factory just outside of newyork city produces 40 packs of gum in 4.2 seconds,each containing 6 sticks of gum. Approximately how many total sticks of gum does the factory produce in one minute?

  220. Math

    Eric has a straight garden path which is 2' x 15'. He wants to cover it with tiles that are each 1' x 2'.How many ways can he do this?

  221. Business math

    254 trade discount series 11/10/11 What is the trade discount and what is the net price of the kennel?

  222. math

    how do you draw a graph of a relation y=-x^2+4 and use appropriate transformation starting with y=x^2

  223. history

    what was the soical structure during the Renaissance in Europe?? please help asap!!!! thankssss:)

  224. Physics ( check answers)

    Question 1 A 0.50 kg football is thrown with a velocity of 15 m/s to the right. A stationary receiver catches the ball and brings it to rest in 0.020s . What is the force exerted on the receiver? So I used mvf-mvi/change(t) I got 375 for that one...

  225. adult education

    Learning the skills to achieve your financial long term goals will help you to be a more responsible adult. is Future Tense the correct verb tense in this sentence and is the word achieve the correct verb?

  226. math

    How do you describe the transformations that were already applied and use them to write a relation for a parabola?

  227. physics

    The driver of the car traveling at a constant 25m/s sees a child suddenly run into the road. It takes the driver 0.45s to hit the brakes. As it slows, the car has a steady acceleration of 8.5m/s©ü. What the total distance the car move before it stops.

  228. Physics - Mechanics and Ocsillatory Motion

    Suppose that each of the three masses in the figure below has a mass of 5.05 kg, a radius of 0.0679 m, and are separated by a distance of 9.9 m. If the balls are released from rest, what speed will they have when they collide at the center of the triangle?

  229. chemistry

    How do you know that from this list, F2 is the strongest oxidizing agent? Mg2+ Mg F2 F- H+ Why is F- the weakest reducing agent from this list? Al3+ Al F2 !@#$%^&+

  230. Calculus

    I need help to start this problem please, A company can sell 4500 pairs of sunglases monthly when the price is $5. When the price of a pair of sunglasses is increased by 10%, the demand drops to 4250 pairs a month. Assume that the demand equation is

  231. science

    how many grams of water do you have if it takes 3000j to raise the temperature from 21c to 100c

  232. geometry

    if ab=3x+11 bc=2x+19 and cd=7x-17 find x

  233. physics

    A 10 kg block slides up a hill to a height of 5.8 m. If 414 J of thermal energy are generated, how fast was the block going at the bottom of the hill? 1 m/s

  234. Math

    Input s ? ? 9 12 15 t 70 66 62 58 54 Write the rule as an equation. Use the equation to extend your pattern.

  235. math

    Each expression is a perfect square. assuming b is greater than 0, find b. A. y=x^2+bx+49 B. y=x^2+bx+1

  236. English

    1. He can play the guitar. 2. He can play guitar. (Which one is correct? Are both OK?)

  237. Math Finite

    A two card hand is dealt from a standard deck. What is the probability of drawing at least one face card?

  238. English

    Hello. I will really appreciate it if you will help me with some language problems. 1)Is an article necessary in the following sentences: "He gave his first press conference as... a)(?)president. b)(?)president of Zimbabwe. c)(?)new president of Zimbabwe.

  239. english

    what are some facts about satire,lampoon,an d parody?

  240. English

    Posted by rfvv on Thursday, December 9, 2010 at 10:03pm. 1. We had to cook the turkey for six hours. 2. We had to cook the turkey in six hours. 3. We had to cook the turkey until six hours. 4. We had to cook the turkey from six hours. 5. We had to cook the

  241. Math Finite

    A box contains 15 pens of which 4 are defective. A random sample of 3 pens is taken without replacement and without regard to order. What is the probability of selecting at least one defective pen?

  242. Analytical Chemistry

    A photon of an X-ray radiation has a wavelength of 5.50 Å. For the radiation, calculate the (a)frequency in Hertz, (b)the energy in Joules, (c) the energy in electron volts (eV) and (d) the energy in kJ/mol.

  243. Analytical Chemistry

    A photon of an X-ray radiation has a wavelength of 5.50 Å. For the radiation, calculate the (a)frequency in Hertz, (b)the energy in Joules, (c) the energy in electron volts (eV) and (d) the energy in kJ/mol.

  244. math

    Luis put $800 in his saving account whichs pays 6% annual interest How much will he have in his account in a year if the interest is compounded quarterly? what is the first quarter principle?

  245. English

    Can you check these sentences,please? Thank you very much. 1) How big/large is the population of New York? Are they both correct? 2)He was dismissed last year and he hasn't found a job yet. 3) He's been working for three years as a mechanic at an assembly

  246. 3rd grade

    What is a number sentence that shows the same product as the product of 9 and 2

  247. algebra

    6x-y=-4 2x+2y=15 Solve for y

  248. Physics

    A satellite has a mass of 101 kg and is located at 1.99x10^6 m above Earth's surface. (a) What is the potential energy of the satellite at this location? (b) What is the magnitude of the gravitational force on the satellite? for potential energy, I was

  249. culinary

    What is a salary for s licensed chef?

  250. Geometry

    Maggie claims that to make the measure of an angle greater, you just extend the rays. How do you respond?

  251. Culinary Arts

    HOW MUCH MONEY DO YOU NEED TO START UP A BUSINESS IN CULINARY?

  252. statistics

    Using the standard normal distribution, find the probability that z is less than -1.78 (Points: 6) 0.0375 0.9625 0.9319 0.0384

  253. Pre-Calc

    I am stuck solving this problem, any help please..Many thanks find all numbers x that satisfy the given equation ln(2x) ------- =2 ln(3x)

  254. English

    I forgot to include the following sentences. Thank you very much. 1) You can do the exercises either on a foolscap or on the photocopy. 2)I like wearing baggy, comfortable clothes. I usually wear diamond-patterned trousers under a plain zip-up sweatshirt.

  255. Physics

    A 24 inch string is wrapped around the 1/8 inch radius axis of a yo yo. Starting from rest the yo yo descends with a constant angular acceleration of 4 rad/second squared. How long will it take the string to completely unwind?

  256. Pre-Calc

    Can someone show me how to do this please. I am stuck. find a number x such that e^2x – 12e^x =13

  257. Science

    What are the different types of seeds??(mustard,apples,etc)

  258. chemistry

    calculate the amount of reactants required to produce 150g of H2O in CO2+H2O

  259. math

    how could I solve for x in this problem (3x+5) to the 7/3 + 22=150

  260. 11th grade

    I need help interpreting a quote...." in this world goodness is destined to be defeated ".

  261. Physics

    A thing rod of length L and negligible mass, that can pivot about one end to rotate in a vertical circle. A heavy ball of mass 5.00kg is attached to the other end. The rod is pulled aside through an angle 30.0 degrees and released. What is the speed of the

  262. math

    Andy had 20% fewer marbles than Henry. When Andy gave 80 marbles to Henry, the numbers of marbles he had left was half of what Henry had. How many marbles did Andy have in the begining? Please help me

  263. physics

    A 10 kg block slides up a hill to a height of 5.8 m. If 414 J of thermal energy are generated, how fast was the block going at the bottom of the hill?

  264. Chemistry!

    What is theoretical yield when 15.6g of bromobenzene & 8.3g of methyl benzoate is used in a Grignard reaction.

  265. Calc.

    Find the minimum cost of producing 20,000 units of a product, where x is the number of units of labor (at$48 per unit) and y is the number of units of capital (at $36 per unit). P(x,y)=100x^.6y^.4

  266. Math !!!!ASAP!!!!!

    How would you write a algerbraic expression depicting the cost of renting a car for (n) days if the daily charge is $24.98 plus 12 cents a mile?

  267. 2nd grade

    Why are the flat surfaces on a rectangular prism called faces?

  268. calc.

    The centripetal acceleration of a particle moving in a circle is a=V^2/r where V is the velocity and r is the radius of the circle. Approximate the maximum percent error in measuring the acceleration due to errors of 3% in velocity and 2% in radius.

  269. Physics

    Tom pushes a 50 kg up a ramp. The ramp is 6 m long and is set at a 15 degree angle. Starting with an initial speed of 1 m/s, Tom begins pushing the box up with a force of 250N. What will the final speed of the box be at the top?

  270. geometry

    in the abcd parallelogram ad=10 units ac= 12 units ed= 4.5 units ab= 8 units. If angle aed = 100 then dec= ?

  271. 7th grade

    how do i solve a+3/5=24/25

  272. 10th grade

    Suppose that a kid was casually sledding down a gentle slopping hill going 6 feet per second. Then, he hit a steeper part of the hill and started accelerating at a rate of 1.2 feet/second squared. At the bottom of the steep part of the hill he was going

  273. physics

    A bullet of mass 8 g strikes a ballistic pendulum of mass 2.0 kg. The center of mass of the pendulum rises a vertical distance of 10 cm. Assuming that the bullet remains embedded in the pendulum, calculate the bullet's initial speed.

  274. calc

    find linear approximations for each of the following and put a bound on the error of the estimate. 1. (7.985)^1/3 using f(x)=x^1/3 and a=8 2. (.9997)^100 using f(x)=x^100 and a=1 please help

  275. chemistry

    1. Nitrogen gas and sodium liquid are produced by the decomposition of sodium azide NaN3 (s). what volume of nitrogen gas, measured at 25 C and 0.980 atm, is produced by the decomposition of 62.5 g of sodium azide? 2. A gas sample in a container with a

  276. finance

    At age 5, how much would you have to save per month to have $1 million in your account at age 65, if your investment rate was 10% per year? Assume no taxes and compounding on a monthly basis.

  277. ant101

    How does the identification of cultural universals impact our understanding of what it means to be human? How does the search for universals help us better understand human cultural behavior? What examples from your own culture can illustrate the ideas

  278. calc

    construct an isoceles triangle with an area of 100. what is the length of the base of the triangle which has the smallest perimeter? Prepping for a test, explanations please

  279. Chemistry

    A protein found in some types of wood-rotting fungi is 0.40% copper by mass. Each protein molecule is known to contain 4 copper atoms. What is the approximate molecular weight of thos compound?

  280. math

    How to find lcm using prime factoriazation

  281. Physics

    Ultrasound reflected from an oncoming bloodstream that is moving at 30 cm/s is mixed with the original frequency of 1.3 MHz to produce beats. What is the beat frequency? (Velocity of sound in blood = 1540 m/s.) Beat frequency = Hz HELP: This problem

  282. Health care

    I need orginal work on this question:• What is one strength you see in the current U.S. health care system? What is one weakness you see? List and describe one of the challenges facing the U.S. health care system.

  283. Chemistry

    A 2.4375 g sample containing a mixture of KClO3 and NaCl is heated and under goes a mass loss of 0.6191 g. What is the percent of KClO3?

  284. physics

    This refers to passive solar collector, where solar radiation is used to heat water. It is therefore not on the solar cells. What characteristics should solar collectors have, to function in an optimal way? Why should these properties be fulfilled? If

  285. Chemistry

    The odor of pineapple is due to the compound ethyl butyrate, which contains hydrogen, carbon, and oxygen. When 3.70g of ethyl butyrate are burned, 8.41g of carbon dioxide and 3.43g of water are the only products. Determine the empirical formula of ethyl

  286. Science

    1. Molten rock from the mantle flows out of active ___________. 2. This type of crust is generally 5-8 KM thick. _____________. 3. The inner and outer cores make up this layer of the earth. ______________. 4. The lightest materials make up the outermost

  287. Finite Math

    I keep trying to set up this problem to solve it using the Simplex Method, but I can't seem to get the tableau set up correctly. If anyone could help, I would appreciate it: A baker has 150 units of flour, 90 of sugar, and 150 of raisins. A loaf of raisin

  288. math

    what fraction strips would you use yto find the sum of 3/8 and 4/8? explain

  289. mechanics

    Q3. A skeet (a small disc) of massM is fired at an angle  to the horizontal with a speed v0. When it reaches the maximum height it is hit from below by a pellet of mass m (m < M) traveling vertically upward at a speed of v. The pellet is embedded in the

  290. physics

    I need to design an object that will sink when placed in a 20-gallon tank of room temperature water. After 30 seconds all or part of the object must resurface and remain floating. Closest to 30 seconds wins. I may not use Alka-Seltzer or any similar

  291. john tyler

    a 751 diver drops from a board 9.10 m above the water's surface. How much kinetic energy does the diver have right before he hits the water?

  292. mechanics

    Q2. A block of massmrests on the left edge of a block of larger massM. The coefficient of kinetic friction between the two blocks is , and the surface on which the larger block rests is frictionless. A constant horizontal force of magnitude F is applied

  293. mechanics

    A wad of sticky clay of massmand velocity vi is fired at a solid cylinder of massM and radius R. The cylinder is initially at rest and is mounted on a fixed horizontal axle that runs through the center of mass. The line of motion of the projectile is

  294. mechanics

    A string is wound around a uniform disk of radius R and mass M. The disk is released from rest when the string is vertical and its top end is tied to a fixed bar. (a) Draw a free body diagram indicating all the forces acting on the disk. (b) Calculate the

  295. word problem

    bought a jumbo box of candy. by the time i got home kids ate 1/4 of candy. Put groceries away and another 1/2 of what was left was eaten. Before dinner ate another 1/6 of what was left. Now there are 10 candies left. How many chocolates were in the box to

  296. 7th grade

    i need help with simple interest math homework.NOW!

  297. math

    How do I find the area if all four sides are not even

  298. English

    1. If I didn't wear a school uniform, then I would be happy every day. 2. If I didn't wear a school uniform, I would be happy every day. (Which one is correct? Are both OK? Which one is popular? What is the difference between the two sentences because of

  299. social studies

    how did geography influence the developement the eastern hemisphere

  300. Calculus

    Find the derivative of y=5^(1-4x) lny=(1-4x)ln5 Can I split it? lny=ln5-4xln5 1/y dy/dx = -[4ln5/(4xln5)^2] dy/dx=-[4ln5/(4xln5)^2]y Thanks.

  301. Algebra one :)

    How do I write these following equations into standard form? Which I know is AX+BY=C 1) 5y-6=2x+3 Do I subtract? What do I do? could someone help me? Thanks!!

  302. history

    how did former president nixon pardon impact the united states?

  303. grammar

    Diagram the simple subject and the simple predicate of each sentence. 1.Where do people use machines? people/use 2. Machines exist in homes, office buildings, and hospitals. Machines/exist 3. What amazing things machines can do! Machines/can do 4. Listen

  304. Math

    How can you take 1 away from 19 and leave 20?

  305. AP PHYSICS

    A hydraulic lift consists of a platform that is supported by a cylindrical piston, which resides in a tube connected to a reservoir of hydraulic fluid. The piston and platform have a mass of 300 kg. The input force is generated at a smaller piston

  306. English

    1. If it's not too big, I will take it. (What is the meaning of 'take' in this sentence? Does 'take' mean 'buy'?)

  307. physics

    Two freight cars, each with a mass of 3.9 105 kg, collide and stick together. One was initially moving at 3.2 m/s and the other was at rest. What is their final speed in m/s?

  308. math

    how do you solove I=$440 P=??? R=7% T=4 years

  309. math

    latoya has 3/4 of a bag of popcorn. If she eats half of the popcorn at the movie, how much does she have left?

  310. com

    I am trying to understand how to determine if a source is credible What do I look for to determine this

  311. math

    the rectangle shown above has a total of 2808 square feet. the length is 78 feet. what is the width

  312. bio

    what is the edge effect? (as part of group living)

  313. physics

    A tugboat pulls a ship with a constant net horizontal force of 5200 N and causes the ship to move through a harbor. How much work is done on the ship if it moves a distance of 3 km?

  314. grammar

    Diagram the simple subject, the simple predicate, and the direct object of each sentence. Diagram any indirect object as well. 1. People solve problems every day. People/solve/problems 2. A computer will provide answers. Computer/will/provide 3. Anidea

  315. bio

    what is prey flushing?

  316. Literature

    Can Shakespeare really transfer successfully to the screen? 500 essay

  317. Algebra one help please?

    Find the missing coeffectient in the equation of the line. -4x+by=10 that passes through (2,3) Could someone explain please.. Thanks.

  318. Math

    kyle just started a new job that pays $7 per hour. He had been making $5 per hour at his old job. Kyle worked a total of 54 hours last month and made $388 before deductions. How many hours did he work at his new job?

  319. Chemistry

    Consider the following reaction: H2O(l) + 3NO2(g) --> 2HNO3(l) + NO(g) What volume of NO (in L) is produced starting from 1.80 g of water and 11.5 g of NO2 at 300 K and 1 atm? (use R = 0.0821 L atm/mol K). I am completely confused :(

  320. calculus

    find linear approximations for each of the following and put a bound on the error of the estimate. 1. (7.985)^1/3 using f(x)=x^1/3 and a=8 2. (.9997)^100 using f(x)=x^100 and a=1 please help explain please too

  321. chemistry HELP

    laboratoories order hydrochloric acid as a concentrated solution (e.g. 36% W/V). what initial volume of concentrated laboratory hydrochloric acid should be diluted to prepare 5.00L of a 0.12 mol/L solution for an experiment? plz can someone show me how to

  322. Math !!!!ASAP!!!!!

    How would you write a algerbraic expression depicting the cost of renting a car for (n) days if the daily charge is $24.98 plus 12 cents a mile?

  323. algebra

    To solve the inequality -1/2 k is greater then or equal to -5, Danny multiplied both sides by the reciprocal of -1/2 . His solution was k is greater then or equal to 10.What mistake did he make? Danny checked his solution, but his check did not let him

  324. Math

    kyle just started a new job that pays $7 per hour. He had been making $5 per hour at his old job. Kyle worked a total of 54 hours last month and made $388 before deductions. How many hours did he work at his new job?

  325. 4th grade

    Jorge and Hector like to play marbles.Jorge had 7 more than four times the number of marbles that Hector had. Together they had 37 marbles. How many marbles did Jorge have?

  326. calculus

    find the derivative of y= sigma (top number is x and bottom number is square root of x) e^t/t dt please and thank you

  327. 5th grade math

    3/7 cup plus 1/4 cup equals how much of a cup of mixture.

  328. Math

    I'm TOTALLY stuck on my math!!! How do I find the unit rate of $11.49 for 3 packages?? I have to round to the nearest hundredth if necessary.... :)

  329. physics

    Objects that allow bulbs to light when inserted in a circuit

  330. english

    "That's one for the medical journal, George," he said. "Doing a Caesarian with a jack-knife and sewing it up with nine-foot, tapered gut leaders." I would like to include this quote in my paper, but am not sure how to do it, since it already contains

  331. mathematik

    wie bestimme ich den drehpunkt von zwei dreiecken?

  332. SOCIAL STUDIES

    What qualifications are needed for a country to become a world power?

  333. and

    A mass of 29kg is moving to the right at 15m/s. That mass collides with a 25 kg mass that is stationary. The masses stick together after the collision. What is the velocity of the masses after the collision? Answer

  334. biology

    discuss the difference between passive diffusion and active transport processes

  335. math

    azul decided to sell cookies to raise money for the needy. she spent $9 at the supermarket for the ingredients. azul then sold 43 cookies at $0.76 each. the profit from the cookies was then donated to the needy. how much did she donate?

  336. Chemistry

    How to find the molarity of NaOH when the given is 0.1803 grams of KHPg/mol molecular w. of KHP is 204.2 9.7 ml NaOH

  337. english/history

    what was the social structure during the european renaissance?

  338. biology

    discuss the function of an active adenylate cyclase

  339. English

    1. Our team practiced soccer every day. 2. Our team practiced the soccer every day. (Which one is OK? Are both grammatical? Do we have to eliminate 'the'?)

  340. Calc

    express 3ln(r)- 5ln(s)+ 7ln (t) as a single logarithm.

  341. Spanish

    Last 4 questions for a while--- 46. Quiero pasear en bote ______. a. en el lago b. en la selva tropical c. en las montañas en el invierno d. en las cataratas A? 47. Voy al mar ___ a. para la selva b. en las cataratas c. para bucear d. hace fresco C? 48.

  342. algebra

    Does this look right? Mike runs twice as far as Jim, but Phillip runs three times as far as Jim. If the three of them run a total of 24 miles, how far does each man run? 2m + j = 24 3p + j = 24 I am so wrong aren't I? Can someone help me, please??

  343. biology

    define PI-PCL and indicate which phospholipids it hydrolizes

  344. english

    whats the crossing the threshold for shrek the mivie?

  345. math

    maria wants to buy concert tickets for her mom and dad.one ticket is $48.she is going to split the cost of the tickets with her 5 brothers.how much will she have to pay?

  346. Math

    Find the measure if the central angle that you would to represent each percent in a circle graph. Round to the nearest degree. 50%

  347. Chemistry

    How many milligrams of NaHCO3 are in a 500mg tablet if 40.0 mL of 0.120M HCL is required to neutralize the sample?

  348. Chemistry

    calculate the theoretical number of moles of HCl equivalent to 1 mole of a) NaHCO3 b)CaCO3 c)Al2O3

  349. Math

    You have 36 stamps that you want to put into a stamp album. Stamp albums are made with either 4 to 6 pages. You need to decide which album you will use in order to have an equal number of stamps on each page. The question is: Choose one album that you will

  350. Chemistry

    a 2.4375 g sample containing a mixture of KClO3 + NaCl is heated and undergoes a mass loss of 0.6191g. What percent of KClO3 is in the mixture?

  351. algebra

    4. Write an equation for the line through the points (2, -6) and (-1, -4).

  352. Chemistry

    a 15.00mL sample of NaOH was titrated to the stoichiometric point with 17.40mL of 0.2340M HCl. a) what is the molar concentration of the NaOH solution? b)calculate the grams of NaOH in the solution.

  353. anthropology

    What are centralized political systems and how do they operate?

  354. Chemistry

    how many milliliters of 0.250M KOH will react with 15.0mL of 0.305 M H2SO4?

  355. Chemistry

    a 2.4375 g sample containing a mixture of KClO3 + NaCl is heated and undergoes a mass loss of 0.6191g. What percent of KClO3 is in the mixture?

  356. Spanish for Whitney

    In case you don't go back to your other post, I don't want you to miss what I wrote: It's new terminology then because for over 70 years I have only heard as verb forms: Seven Simple Tenses: Present Indicative (Presente de Indicativo), Imperfect Indicative