1. Archives
  2. 2010
  3. November

Questions Asked on
November 2, 2010

  1. Calculus - integration

    Integral of (2x+5sin(x))^2 dx i didn't know how to start this question so i expand the squre first and then did the rest but its wrong and i don't think my method is right. thank you.

    asked by L

  2. Statistics

    IQ test scores are normally distributed with a mean of 97 and a standard deviation of 11.An individual's IQ score is found to be 123.Find the z-score corresponding to this value

    asked by Rachel

  3. space

    How many Earth Diameters would it take to reach the Sun 93,000,000 miles away?

    asked by Emma

  4. Physics

    A rock climber part way up a cliff face drops a piton and it falls for 2.0 s before hitting the ground. How high up is he?

    asked by Pauline

  5. science

    If a car is at a stop and it has to travel 2 miles and its speed is zero to sixty in 9 seconds asuming that you give it full power how fast will it be traveling when it travels 2 miles?

    asked by Robert

  7. 7th grade

    4n+8=9n-7

    asked by Anonymous

  8. science

    what is the ratio of 8gm of sugar in 500ml of water

    asked by Lu

  9. spanish

    The class is organizing a “paella party.” Tell who is in charge of each task and use direct-object pronouns. 1. ¿Quién va a preparar la ensalada? Mirta y Lidia 2. ¿Quién va a limpiar el apartamento después de la fiesta? La profe

    asked by AYUDA ME PORFAVOR!! :)

  10. chemistry

    A 13.0 mL sample of an unknown HClO4 solution requires titration with 25.2 mL of 0.180 M to reach the equivalence point. What is the concentration of the unknown HClO4 solution? The neutralization reaction is as follows: HClO4 +NaOH ===>> H2O +NaClO4

    asked by john

  11. Chemistry

    What wavelength of light would be emitted when an electron in a hydrogen atom drops from energy level 5 to energy level 1?

    asked by Shayne

  12. spanish

    After the party, tell a friend who was in charge of each task. Use direct-object pronouns in your answers. ¿Quién compró los mariscos? Rosa ¿Quién preparó la ensalada? Mirta y Lidia ¿Quién limpió el apartamento después de la fiesta? La profe

    asked by AYUDA ME PORFAVOR!! :)

  13. Math

    Graph the circle 4x^2+4y^2-24x-16y-29=0

    asked by Alicia

  14. ACC

    Smithson Corporation had a 1/1/10 balance in the Allowance for Doubtful Accounts of $10,000. During 2010, it wrote off $7,200 of accounts and collected $2,100 on accounts previously written off. The balance in Accounts Receivable was $200,000 at 1/1 and

    asked by Shamy

  15. physics

    A 2.38 × 103 kg car requires 5.4 kJ of work to move from rest to some final speed. During this time, the car moves 28.1 m. Neglecting friction, find a) the final speed. Answer in units of m/s.

    asked by Joe

  16. chemistry

    Is there a reaction? 2 NaNO3 + ht →

    asked by m

  18. physics

    It says, A plane travels 400 mi/h relative to the ground. There is a 25 mi/h wind blowing from the west to the east. Find the plane's resultant velocity as it: a. travels west: b. travels east: c. travels north: d. The plane's final destination is 1250

    asked by spandana siram

  19. Physics Help PLEASE!!!

    A 10 kg ball moving due west at 2m/sec collided with a 4kg ball that is moving due east at 3m/sec. you determine that immediately after the collision the 10 kg ball is moving due west at .57 m/sec. a) this probably is a totally elastic collision b) this

    asked by Jael

  20. math

    I was given this by my teacher for extra credit 1 _ _ _ _ _ 1 _ the blanks are numbers from 0-9 excluding 1 since it was given. I need to know how many possible combinations are left and if there is a good website that will generate all the combinations.

    asked by Karl Smith

  21. CHEMISTRY

    If a small stream of liquid A was strongly deflected by a charged object, liquid B was moderately deflected, and liquid C was weakly deflected rank the liquids in order of polarity. (Assume densities and charges are all equal.)

    asked by RILEY

  22. Algebra

    Carl had packed 6 crates by 8 a.m. By 11 a.m., he had packed 24 crates. Find the average rate of change in crates packed from 8 a.m. to 11 a.m.

    asked by need help!

  23. math grade 11

    I need help with this question determine the values in k for which the function f(x)= 4x^2-3x+2kx+1 has two zeros. Check these values in the original equation. i don't get how to do it please help me.

    asked by priya

  24. help on geography!!

    Where is the LCL (lifting condensation level) on the leeward side of and why?

    asked by Amanda

  25. Organic Chemistry I

    Which acid, maleic or fumaric acid appears to be more reactive to bromine addition? How does the cis/trans affect this?

    asked by Nick

  26. physics

    An 8.00 g bullet is fired into a 160 g block that is initially at rest at the edge of a table of 1.00 m height. The bullet remains in the block, and after the impact the block lands d = 2.1 m from the bottom of the table. Determine the initial speed of the

    asked by Blair

  27. physics

    A 0.25 kg ball is thrown straight up into the air with an initial speed of 20 m/s. Find the momentum of the ball at the following locations.

    asked by Blair

  29. maths

    if bisector of any angle of triangle bisects he opposite side then it is isoceles triangle

    asked by abhiskar

  30. Derviatives

    Differentiate. V(x) = (3 x^3 + 3)(x^4 - 3 x)

    asked by Michael

  31. physics- please help!!

    A beam of microwaves with = 0.7 mm is incident upon a 12 cm slit. At a distance of 2 m from the slit, what is the approximate width of the slit's image?

    asked by big

  32. physics

    what force will accelerate a 2000-kg. truck at a rate of 0.50

    asked by hehe

  33. matematik

    26 ın karesi 2.26.25+25 karesi

    asked by matematik

  34. math

    Cool mind teaser! -1, -6, 3, 68, 255, 654, 1379 Whats the patttern?

    asked by MArie

  35. Physics Help PLEASE!!!

    A 10 kg ball moving due west at 2m/sec collided with a 4kg ball that is moving due east at 3m/sec. you determine that immediately after the collision the 10 kg ball is moving due west at .57 m/sec. a) this probably is a totally elastic collision b) this

    asked by Jael

  36. Ab Initio Derivative

    Can anyone plz post the procedure for finding the derivative of :- e^ax by ab inition method?

    asked by Mos Def

  37. FIT

    Joe Nautilus has $120,000 and wants to retire. What return must his money earn so he may receive annual benefits of $20,000 for the next 14 years?

    asked by Ann

  38. History

    The Arian heresy asserted what concept?

    asked by Kimesha

  40. chemestry

    At 298.K and 1.00 atm, assume that 22 mL of NO gas reacts with 18 mL of oxygen gas and excess water to produce nitric acid according to the following equation: O (g) H O(l) 2 HNO (g) 2 3 2NO(g) + 2 + 2 ¾¾® 3 . If all of the nitric acid produced by this

    asked by lore

  41. history

    What strategy did Lee adopt in 1864, and what was his goal?

    asked by Attalah

  42. math word problem

    The Main Hall on the college campus has four main levels, from the basement up to the third floor. The technology staff in the basement occasionally needs to see the President, who is on the first floor, and the Dean who is on the third floor. The stairs

    asked by M.A.

  43. orgo

    Which acid, maleic or fumaric acid appears to be more reactive to bromine addition? How does the cis/trans affect this?

    asked by Nick

  44. ELA

    what are "how to" essays called ???

    asked by S.

  45. trig

    the shadow of a tower is 2y meters longer at 30 degree than when it was at 45 degree. find the height of the tower

    asked by priya

  46. geometry

    make a conjecture 6,12,9,18,15

    asked by Anonymous

  47. algebra

    the graph of the axis of symmettry of the parabola y=2x^2-11x+3 is best describe by which of the following equations?

    asked by Randy

  48. algebra

    The cariable x satisfies the equation 3^x.4^(2x+1)=6^(x+2). By taking logarithms of both sides,show that x=log9/log8

    asked by Matteo

  49. Chemistry

    Consider the following chemical equation. Na3PO4(aq) + Ca(OH)2(aq) → Ca3(PO4)2(s) + NaOH(aq) How many grams of calcium hydroxide must react to give 2.81 g of Ca3(PO4)2? please explain step by step

    asked by Anonymous

  51. ALGEBRA

    Company A charges $55 per day plus $0.35 per mile to rent a car. Company B charges $50 per day plus $0.40 per mile. Jack wants to rent a car for three days. How many miles should Jack be traveling so that Company A is less expensive than Company B?

    asked by CHANTELL

  52. algebra 2

    Factor: 27X^2-90X+27

    asked by angel

  53. Algebra

    Hot Java Coffee Company adverties their decaffeinated coffee as 97% caffeine free as compared to their regular caffeinated coffee. If a cup of coffee is 8 ounces, how many ounces of decaffeinated coffee would you have to drink to get the equivalent amount

    asked by Bob

  54. physics

    a body is thrown downward with an initial speed of 20.0 m/s on earth. what is the acceleration of the object

    asked by juan

  55. algebra

    C=3000 / 300-3X

    asked by Sam

  56. math

    what is a communitative property

    asked by clara

  57. physics please help

    A 5.00 kg ball (ball 1), moving to the right at a velocity of +4.00 m/s on a frictionless table, collides head-on with a stationary 7.60 kg ball (ball 2). Find the final velocities of the balls if the collision is as specified below. (a) elastic collision

    asked by jason

  58. math

    a man saved a sum of 200 dinars in the first month, 250 in the second month, 300 in the third month and he continue to save at the streght. after how many month can he buy a radio instronment coastin 13500 dinars

    asked by sonia

  59. Chemistry

    If 36.00 mL of KMnO4 solution are required to oxidize 25.00mL of 0.02932 M Na2C2O4 solution what is the concentration of KMnO4?

    asked by Tilly

  60. Statistics

    What are the steps espoused by Applied Statistics in Business and Economics for formal hypothesis testing? Explain why the sequence is important. What might happen if the hypothesis test is performed before the researcher has decided on the significance

    asked by Kathy

  62. science

    A player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 m/s. How long was the ball in the air?

    asked by Coby

  63. Algebra

    What is the domain of y = 2/(x) + 2 x>0 x=0 All real numbers except x = 0 I think the domain is All real numbers except x = 0 Is that correct?

    asked by Matt-

  64. American Government

    If the U.S. were to have another constitutional convention, would we keep a federal system or change it? why or why not?

    asked by Becky

  65. math

    x/3 = x+10/6

    asked by m

  66. algebra

    How do you determine how to solve y=10x-8,y=1/2x+5

    asked by Kayla

  67. American Government

    If the U.S. were to have another constitutional convention, would we keep a federal system or change it? why or why not?

    asked by mary

  68. Math

    2x+3y+4, 1.2x+1.8x+2.6

    asked by Brown

  69. Physics

    A novice skier, starting from rest, slides down a frictionless 35.0 degrees incline whose vertical height is 140 m. 1. How fast is she going when she reaches the bottom?

    asked by Nick

  70. Fluid Mechanics

    A tank is 180cm long, 90cm deep and 90cm wide at the top, tapering to 30cm wide at the base. If the tank is completely filled with water, calculate: a) the total weight of the water in the tank b) The total force exerted by the water on the bottom c) The

    asked by Claire

  71. pre calc

    Determine between which consecutive integers one or more real zeros of f(x) = –x3 + 2x2 – x – 5 are located

    asked by shayla

  73. Chem

    In the |Molecular Geometry Lab 1. List three ways in which models used in this experiment are inaccurate representations of orbitals? 2.explain why the ClF3 molecule is not a trigonal planar molecule?

    asked by Leon

  74. math

    a dailly farmer produce 50 tons of rice in the first day, 57 tons in the second day, and 64 tons in the third day. the production continue to increase in the same manner up to the 28 day. what is the a) production of the farmer on the 28 day? b) what is

    asked by sonia

  75. Physics

    What is the force necessary to accelerate an object with a mass of 115 kg and and an acceleration of 6 m/s2 (squared) east?

    asked by George

  76. Chemistry

    What is structural formula of Ester?

    asked by Mr.Science

  77. chemistry

    How many mL of 0.25 M H2SO4 can be made from 50.0mL of 0.50 M H2SO4? Also in this case, what does the capital M stand fro?

    asked by James

  78. chemistry 1A

    If 0.2178 g of a diprotic solid acid is neutralized by 44.81 mL of 0.0953 M NaOH, calculate the molar mass of the solid acid

    asked by Jake

  79. psychology

    Today, most psychologists take ____ approach to human development. a nativist an empiricist a dualist an interactionist

    asked by erica

  80. science

    what is the most liquid found in the earths atmosphere

    asked by Anonymous

  81. Physics

    A woman runs a kilometer using a force of 210 N and a power output of 500 W. How long in minutes does it take this woman to complete 1 kilometer?

    asked by Josh

  82. math

    The length of each side of a triangle is an even number. If no two of the sides are equal, what is the smallest perimeter the triangle coul d have? ans-18

    asked by dhiraj

  84. science

    what man made object has the greatest acceleration ?

    asked by sophie

  85. Derviates

    Find f '(x) and f ''(x). f(x) = x^(9\/ 2) e^x

    asked by Michael

  86. english

    my class room is on the ground floor of main building

    asked by suga

  87. Dervatives

    Differentiate the following function. u = 4 root3(t) + 9 sqrt(t^9)

    asked by Michael

  88. math

    solve the two sided inequality and show the solutin on real number 7

    asked by Samee

  89. science

    What color is a tadpole

    asked by Toshi

  90. science

    Is 2Ag+S the same as Ag©üS?

    asked by Rachel

  91. chemical principal

    a chemist weidghed 1.25g of sodum hydroxide ,placed it in a volumetric flask and then added enough deionized water to bring the total volume to 250mL. How many moles of NaOH were added to the volumetric flask

    asked by sue

  92. biology

    what is a section of DNA that governs physical and behavioral traits called?

    asked by gmoney

  93. AP Physics B

    What is the force of Friction as a 12 kg object slides down for 30 meters down a 30 degrees incline at a constant velocity?

    asked by Asim

  95. Spanish

    Sports and hobbies and pastimes What sports associate with these body parts? Mentioned many sports and activities as possible (as many... As possible) for each body part. 1. legs and feet 2. arms and hands 3. hands and fingers 4. eyes 5. head

    asked by anatomy

  96. math

    find the dimensions of a rectangle with a perimeter of 780m if the length is 15 more than 4 times the width.

    asked by jim

  97. CHEMISTRY..please help..thanks

    If a small stream of liquid A was strongly deflected by a charged object, liquid B was moderately deflected, and liquid C was weakly deflected rank the liquids in order of polarity. (Assume densities and charges are all equal.)

    asked by Lyn

  98. chemistry

    A scuba diver's tank contains .25 kg of oxygen compressed into a volume of 4.3 L (for oxygen, 32g = 1 mole) Calculate the gas pressure inside the tank at 9 degrees Celsius What volume would this occupy at 26 degrees Celsius and .95 atmospheres?

    asked by Bob

  99. American History

    Which of the following statements most accurately characterizes immigrants' accommodation to city life in the United States around 1900?

    asked by John

  100. Language Arts

    Is there a website that can help me check my answers for Sadlier-Oxford Vocabulary Workshop?

    asked by Anonymous

  101. Chemistry

    A certain brand of iron suppluement contains FeSo4 7H20 with miscellaneous binders and fillers suppose 22.93 mL of KMnO4 solution used in the question above are needed to oxidize Fe2+ to Fe3+ in a 0.4927g pill. What is the mass percent of FeSo4 7H20(molar

    asked by Anna

  102. math

    FInd the equation of a line through the point (-2,5) with a slope of -2

    asked by brittany

  103. math

    Find the equation of a line through the points (-2,3)and (-4,5)

    asked by brittany

  104. Math

    What does it mean if a line in R^3 is parallel to the xy-plane but not to any of the axes. I really don't know what this means in terms of how the parametric and symmetric equations of the line should look. Please help.

    asked by Kate

  106. chemisty help please

    A scuba diver's tank contains .25 kg of oxygen compressed into a volume of 4.3 L (for oxygen, 32g = 1 mole) Calculate the gas pressure inside the tank at 9 degrees Celsius What volume would this occupy at 26 degrees Celsius and .95 atmospheres?

    asked by Billy

  107. physics

    To push a 25.0kg crate up a frictionless surface incline angled at 25 degrees to the horizontal, a worker exerts a force of magnitude 209N parallel to the incline. As the crate slides 1.50m, how much work is done on they crate by (a) the worker's applied

    asked by Lyss

  108. algebra

    Factorise 4x^2-7x+3= and 6x^2+10x-5= Thanks Method would be good-as I am stuck.

    asked by George

  109. math

    If a person makes $30,000 in 2004 and the inflation rate is 4% annually, how much is this salary worth in the year 2008 (in terms of 2004 dollars)? What I have is 2004=30000 2005=30000x1.04=32448 then continuing through the years to 2008=35095.76

    asked by m

  110. math

    whats square root of 16

    asked by mike

  111. ethics

    What are the consequences of violating a workplace standar? Is incarceration one of the possibilities? Why or why not? In addition, what does "relinquishing the approbation" mean? I'm not familiar with this term. Can you clarify?

    asked by Anonymous

  112. English

    I'm writing an essay on the short story, The Bouquet. It's a essay on the character of Mary Myrover. Tell me what you think... =D Mary Myrover is Charles W. Chesnutt's major character in the short story, "The Bouquet". She is a prideful, southern white

    asked by Matthew

  113. elementary functions

    factor x2-3x+4

    asked by ariyonia

  114. Maths

    What is dy/dx of e^-x ?

    asked by Hannah

  115. 11th grade Physics

    An open pipe 0.40m in length is placed vertically in a cylindrical bucket having a bottom area of 0.10 m^2. Water is poured into the bucket until a sounding tuning fork of frequency 440 Hz, placed over the pipe, produces resonance. Find the mass of water

    asked by Garry

  117. math

    its a function table input|output -3 | 7 0 | 1 3 |-5 8 |-15

    asked by jennifer

  118. physics

    for an object sliding down an uneven incline, which of the following represents the change in height necessary for the velocity to double in terms of its initial velocity V? a)2V 2(subscript)*g b)3V/g2(subscript) c)3V 2(subscript)/2g d)3V/2g e)2g/3v

    asked by Asim

  119. 11th grade physics

    Rachel pulls her 177N suitcase at a constant speed by pulling on a handle that makes an angle (-) with the horizontal. Using frictional force on the suitcase as 27N and Rachels force on 43N on the handle to calculate the net force. 1. What angle does the

    asked by Zack

  120. 11th grade physics

    You place a box with a mass of 20kg on an inclined plane that makes a 35.0° angle with the horizontal. What is the component of the gravitational force acting down the inclined plane?

    asked by Johnaton

  121. physics

    Two people start at the same place and walk around a circular lake in opposite directions. One walks with an angular speed of 1.40 10-3 rad/s, while the other has an angular speed of 3.10 10-3 rad/s. How long will it be before they meet?

    asked by Danica

  122. math 5TH GRADE

    write a story problem that represents each division expression.then solve the problem a. write a story problem that represents 528/24 divided

    asked by Arjel

  123. algebra

    How many black keys are there in one octave?

    asked by sammie

  124. english

    describe your experience with credit and credit cards in a brief paragraph using at least five adverbs and five adjectives in your description bold the adverbs and underline the adjectives what is the most effective way to determined whether a word is an

    asked by shelia

  125. english

    I have to identify the adverb and the word or words the adverb modifies. 1.Some kinds of opals are extremely beautiful. 2.The ocean appears especially beautiful at sunrise. 3.On Sunday, the dogs in my neighborhood barked early. 4.No room remained at the

    asked by Amy

  126. calculus

    A lighthouse is built on an exposed reef, 5.5 miles off-shore. The shoreline is perfectly straight, and a town is located 6.5 miles downshore from the point on the shoreline nearest the lighthouse. The lighthouse keeper needs to go from the lighthouse to

    asked by Anonymous

  128. physics

    After 10.0 s, a spinning roulette wheel at a casino has slowed down to an angular velocity of +1.56 rad/s. During this time, the wheel has an angular acceleration of -5.45 rad/s2. Determine the angular displacement of the wheel.

    asked by Danica

  129. Algebra

    Factorise completely: 6x^2+10x-5= and 6x^2+8x-3=

    asked by Daniel

  130. Math

    A cyclist and a jogger start from a town at the same time and head for a destination 11 mi away. The rate of the cyclist is twice the rate of the jogger. The cyclist arrives 1.1 h before the jogger. Find the rate of the cyclist.

    asked by Heidi

  131. English

    We have to analyze an analogy for our English class. I remember a very interesting demonstration I saw several years ago--the person took two glasses, one being large, the other small. He poured water into the large one about halfway, and then transferred

    asked by Kayla

  132. match

    1. Find the x- and y-intercepts algebraically, showing all work for: y = –(2/3)x + 30

    asked by Darcy

  133. cultural diversity

    List two to three characteristics of Orientalism

    asked by Anonymous

  134. Algebra

    A single-engine airplane carries enough fuel for an 8-hour flight. After the airplane has been flying for 1 h, the fuel tank begins to leak at a rate that would empty the tank in 12 h. How long after the leak begins does the plane have until it runs out of

    asked by Heidi

  135. calculus

    A lighthouse is built on an exposed reef, 5.5 miles off-shore. The shoreline is perfectly straight, and a town is located 6.5 miles downshore from the point on the shoreline nearest the lighthouse. The lighthouse keeper needs to go from the lighthouse to

    asked by Anonymous

  136. finanace

    why is it important to go through these steps when you are planning on making a large purchase

    asked by shelia

  137. History word

    Could someone explain what socialism is in a more easier way? Socialism is an economic and political theory advocating public or common ownership and cooperative management of the means of production and allocation of resources. (Wiki)

    asked by Amy

  139. geometry

    Find the value of x Show work 3x _ = x+15 2

    asked by Matthew

  140. ethics

    What is a workplace example of utilitarianism?

    asked by Anonymous

  141. global issues

    For my pro side on the paper 'should the richer countries of the world help the poorer countries?'I have written about two pages so far. Starting with my introduction, and going in to my first two main points. I just wanted to get it all checked before I

    asked by y912f

  142. PHYSICS ---HELP!

    A man doing push-ups pauses. His mass is 80-kg. Determine the normal force exerted by the floor on each hand and on each foot. a = 40 cm b = 95 cm c = 30 cm W = mg = 784 N

    asked by robin

  143. US History

    4. If Britain and France had not adopted a policy of appeasement, would Adolf Hitler have been as successful as he was in overruning Europe? Thanks -MC

    asked by mysterychicken

  144. chemistry

    DETERMINE the enthalpy for the reaction CH4(g)+NH3(g)->HCN(g)+3H2(g)

    asked by ISABEL

  145. english 6th grade

    what does restrictive and nonrestrictive mean???????

    asked by sophie

  146. Physics

    Suppose you discover your grandfather's collection of Caruso records from the early part of the century. These disks played at 78.0 revolutions/minute (rpm) and were 9.00in. in diameter. What was the radial acceleration of a point on the rim of such a

    asked by Carmen

  147. ELA

    Where is the complete subject in this sentence, "The goal of settlement houses is the improvements of neighborhoods"?

    asked by Stella

  148. chem

    A scuba diver's tank contains .25 kg of oxygen compressed into a volume of 4.3 L (for oxygen, 32g = 1 mole) Calculate the gas pressure inside the tank at 9 degrees Celsius What volume would this occupy at 26 degrees Celsius and .95 atmospheres? can someone

    asked by Bob

  150. Foreign Languages

    how do you say goodafternoon in evry laungega

    asked by sophie

  151. Algebra

    Factorise completely: 6x^2+10x-5= and 6x^2+8x-3=

    asked by David

  152. math gr.6

    Does anyone has questions (page 22) from pearson math makes sense grade 6 book? Please, help. I forgot my book at school and I only need questions? Thank, you.

    asked by Anonymous

  153. english

    Could someone please check for me? I have to list the adverb and then list the word the adverb modifies. 1. She is particularly interested in sports. 2. Have you ever climbed a mountain? 3. Which part of the assignment would you do next? 1.particularly-is

    asked by Zack

  154. Chemistry

    Please help me solve this problem. I don't know how to approach this problem type. C3H8(g) + 5 O2 (g) ---- 3 CO2(g) + 4H2O(g) Conside the reaction. If you start with 7.0 moles of C3H8 (propane)and 7.0 moles O2, ________ mole(s) of carbon dioxide will be

    asked by Cliff

  155. Math

    -5+r=2r+3 what does r equal

    asked by Maddy

  156. trigonometry

    Prove cos4x = 8 cos^4x-8 cos^2x+1

    asked by Dini

  157. trigonometry

    Graph the function f(x)=-1/2sin2x+1 on the interval [-2pi, 2pi]

    asked by Dini

  158. PHYSICS ---HELP!

    A man doing push-ups pauses. His mass is 80-kg. Determine the normal force exerted by the floor on each hand and on each foot. a = 40 cm b = 95 cm c = 30 cm W = mg = 784 N

    asked by robin

  159. biology 101

    • Human culture is changing faster than humans can evolve. What evidence of rapid environmental change do you see locally, nationally, and globally?

    asked by Anita fields

  161. trigonometry

    Prove: sin3x-sinx/cos3x-cosx=-cot2

    asked by Dini

  162. math

    ((-16-(-2+1))x2 5x-(x=2)>-5((1+x)=3

    asked by traci

  163. 8th grade math

    What is 25% of $20.00. What is the total cost of the item? I multiplied 20 x .25 and my answer was 5.00 Then I subtracted 5.00 from 20.00 making my final answer $15.00 for the item. Please tell me if this is correct.

    asked by Lane

  164. Chemistry- helpp!

    The equation for synthesis of the poisonous gas COCl2 is CO(g) + Cl2(g)COCl2 If 43.2 kJ of energy is evolved when 39.5 g of COCl2 is synthesized, what is the molar enthalpy for this synthesis? THANK YOU!

    asked by Melissa

  165. algebra

    i need to simplify s to the tenth power over s to the sixth power

    asked by Bryan

  166. chem

    In a vehicle, H2 could be used in a fuel cell to generate energy. Hydrogen is not an energy source, but a means of transporting energy because the extraction of H2 from the logical source, H2O, takes as much energy as is returned when the gas is used. 2

    asked by Andrew

  167. English

    I'm writing an essay on the short story, The Bouquet. It's a essay on the character of Mary Myrover. Tell me what you think... =D Mary Myrover is Charles W. Chesnutt's major character in the short story, "The Bouquet". She is a prideful, southern white

    asked by Matthew

  168. Intro Chem

    4Al(s) + 3O2(g)2Al2O3(s) Delta H reaction = -3351.4 kJ How much energy is transferred when 42.6 g of aluminum reacts to form aluminum oxide? Thanks

    asked by John

  169. science 9

    what is the volume in liters of an aquarium that is 140cm X 30cm X 17cm

    asked by Jesseca

  170. math

    Take any number (except for 1). Square that number and then subtract one. Divide by one less than your original number. Now subtract your original number. Did you reach 1 for an answer? You should have. How does this number game work? Hint: Redo the number

    asked by Paula

  172. Math 7th grade

    LCM of 8x^5y^3z^2 and 26x^6y^2w^5 plz help me

    asked by Max

  173. band

    i need help writting three sentences for social studies

    asked by post a new question

  174. math

    true or false 1 to the negative fifth power=(-1) fifth power

    asked by Bryan

  175. Chem

    You place a test-tube of a room temperature reagent into a beaker of hot water. Which of the following statements are true? (Assume that there are no energy transfers between anything except the reagent and the water.) Choose at least one answer. a. q

    asked by John

  176. geometry

    in triangle GHJ, k(2,3) is the midpoint of GH, l(4,1) is the midpoint of HJ and m(6,2) is the midpoint of GJ. Find the coordinates of G,H and J. can you please show me how to find this? i don't really understand how it would be done. thank you.

    asked by maria

  177. chemm

    A scuba diver's tank contains .25 kg of oxygen compressed into a volume of 4.3 L (for oxygen, 32g = 1 mole) Calculate the gas pressure inside the tank at 9 degrees Celsius

    asked by ally

  178. 12th grade

    You're riding on a train that's moving at 50 km/h, and you roll a ball down the aisle at 2 km/h in the same direction as the train is moving. If a person standing on the ground near the train track could see the ball, how fast would it appear to be moving?

    asked by Anonymous

  179. CHEM. help please

    2 H2O (l) → 2 H2 (g) + O2 (g) 1. Without doing any calculations, which side will enthalpy favor in this reaction? Entropy? 2. What volume of water in gallons would need to be split to store the same amount of energy as found in 10.0 gallons of gasoline?

    asked by Andrew

  180. Economics and development studies

    What is poverty? Why is important to understand the different context in which poverty manifests itself? Its an essay question Reference needed

    asked by Gibbons

  181. social studies

    can you help me start my persuasive essay on saying no to the florida amendment 2 2010?

    asked by majenta

  183. English

    Can you please let me know if the following exercises are correct? In particular, can you help me formulate the questions more clearly? 1)Write the following dates in letter form. (Example: May 5th 1984 ...) 2) Write down questions for the underlined

    asked by Franco

  184. economics and development studies

    What is population? Discuss the connection between population and development. Its any essay so bibliography

    asked by Gibbons

  185. Physics

    A 23.0 kg block is initially at rest on a horizontal surface. A horizontal force of 80.0 N is required to set the block in motion. After it is in motion, a horizontal force of 57.0 N is required to keep the block moving with constant speed. Find the

    asked by Maria

  186. poetry

    In "There is no frigate like a book," the lines "Nor any coursers like a page/of prancing poetry" use meter to show

    asked by ink

  187. social studies

    do you think that the english bill of rights guaranteed freedom of religion? why or why not?

    asked by kk

  188. Economics and development studies

    Define food aid critically analyse it relevance to the developing prospects of the deloping countries. Its an essay reference needed

    asked by Gibbons

  189. Chemistry

    Suppose that you had a mercury-in-glass thermometer marked and calibrated to measure temperatures from -10 degrees celsius to 110 degrees celsius and you wished to measure a temperature of approximately 115 degrees celsius accurately. How might you use

    asked by Chris

  190. Chemistry

    In calibrating a thermometer by setting only the freezing and boiling points, what assumptions are you making regarding the internal diameter of the thermometer and the expansion of alcohol?

    asked by Chris

  191. economics

    Differeciate macroeconomics and microeconomics

    asked by Gibbons

  192. Chemistry

    Use the bond energies given in the "Bond Energy" table (can be gained from google) to estimate the delta Ho for the reaction given below. 2ClF3(g) + 2O2(g) Cl2O(g) + 3OF2(g) I did this: 1530 + 996 - (410 + 570) = 1546. But the answer was wrong. I don't

    asked by Melissa

  194. Chemistry

    Calculate the change in heat for the reaction SO2 + 1/2O2 --> SO3

    asked by Mary

  195. algebra

    28=2h-18

    asked by George

  196. social studies

    what are united staes citizens market economies -- 14 letters

    asked by anonamus

  197. Math (extra practice)

    I don't get how to do this. Use these numbers to get the answer showen below. However, don't stick numbers together. Try to get: 22 Using: 3, 6, 5, 5, 0 The teacher gave us the answer but I don't know HOW this works: 3! + (6*5) - (5+0)

    asked by Bridgett

  198. physics - - -

    A 12.0g bullet is accelerating from rest to a speed of 700m/s as it travels 20.0cm in a gun barrel. How large is it's accelerating force ?

    asked by Reema

  199. Physics

    A student, crazed by final exams, uses a force P of magnitude 80 N to push a 4.0 kg block across the ceiling of his room. If the coefficient of kinetic friction between the block and the ceiling's surface is 0.42, what is the magnitude of the block's

    asked by Lily

  200. Biochemistry

    The restriction enzyme BamHI recognises the sequence 5’-G^GATCC-3’, cleaving between the first and second G, as indicated. Which of the following restriction enzyme recognition sequences will be cleaved to give sticky ends that are compatible with

    asked by Arran

  201. Biology

    You are given the following protein sequence: NH2-Met-Trp-Trp-Met-Trp-Met-COOH What was the sequence of the mRNA? You must write your answer 5' to 3' direction, starting with the first nucleotide of the mRNA and ending with the last nucleotide of the mRNA.

    asked by Dean

  202. physics

    how do you find worknet

    asked by jon

  203. Math(rewrited)

    Answer: 31 (writing was really small) Use: 3, 5, 5, 6, 0 How: 3! + (6*5) - (5+0)

    asked by Bridgett

  205. AP European History

    What were the factors responsible for western europe's domination of world trade from 1650-1800? i have to know 2 economic factors, 2 technological factors, and 2 institutional factors. please help this is going to be on a test that i' taking

    asked by Sally Sue

  206. social studies

    can you help me start my persuasive essay on saying no to amendment 8 2010?

    asked by jenny

  207. Physics

    A 3.0 kg block is being pulled with a horizontal force of 29.7 N. If the block is accelerating at 3.2 m/s/s, what is the coefficient of kinetic friction between the block and the table?

    asked by keith

  208. geometry

    The circumference of a circle is approximately 28.26 cm. Find its diameter and radius

    asked by Cynthia

  209. social studies

    what are some details on saying no to the florida amendment 2 2010?

    asked by majenta

  210. algebra 1

    the length of a rectangular swimming pool is 12 feet longer than two thirds its width. if theperimeter of the pool is 44 feet,what is the length of the pool?

    asked by lula

  211. social studies

    what are some details for saying no to amendment 8?

    asked by jenny

  212. Physics

    What is the pressure difference required to make blood flow through artery of inner radius 2.0 mm and length 0.18 m at a speed of 5.6 cm/s? I used P1-P2 = speed*8*n*L/r squared n = viscosity of blood = 4 x 10e-3 L = .18 m r = 2 x 10e-3 m When plugged in I

    asked by Dee

  213. Chem help

    Calculate the frequency of the light emitted when an electron in a hydrogen atom makes each transitions.? n=4 => n=3 ? v = ________________ s^-1 n=5 => n=1 ? n=5 => n=4 ? n=6 => n=5 ? I got the first one correct (1.6*10^14) but the rest i am getting wrong.

    asked by AMY F

  214. algebra : square root

    I remember my teacher saying something about you square root an answer like 121 the answer is -11 and +11 But, this also is not true for all the answers Could someone tell me when I square root a number, when it is both a + and -, and when it is just a + .

    asked by Amy

  216. Algebra: i

    when the square root of a # is -2 when would the answer be 2i or just square root of -2. Because when I sometimes do problems, sometimes I have to change it to #i and sometimes I have to just leave it. Would anyone know which one I use for different

    asked by Amy

  217. Physics

    Miss E. deWater, the former platform diver of the Ringling Brothers' Circus, dives from a 20 meter high platform into a shallow bucket of water. a. State Miss E.deWater's acceleration as she is falling from the platform? b. What assumptions must you make

    asked by Lilly

  218. Physics

    Michael Jordan was said to have a hang time of 3 seconds. Use kinematic equations to determine the height to which MJ could leap if he had a hang time of 3 seconds. Hint: You are solving for distance!

    asked by Lilly

  219. Physics

    A race car has a mass of 715 kg. It starts from rest and travels 38.0 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is exerted on it?

    asked by Kevin

  220. General Chemistry

    If 30 L of Oxygen are cooled from 200 degrees celsius to 1 degree celsius at constant pressure, what is the new volume of oxygen?

    asked by Heather

  221. chemistry

    What is the new volume of the balloon, where the pressure is 0.25 {\rm atm} and the temperature is -20^\circ C .

    asked by What is the new volume of the balloon, where the p

  222. science

    Why are so much niches available on so much recently devastated islands?

    asked by David

  223. 2nd grade math

    tell how to make 10 when adding 8+10

    asked by amanda

  224. Government

    1. George W. Bush has called for an expansion in the role of __ in administering federal social programs a. colleges and universities b. big business c. state gov't d. federal bureaucrats e. religious organizations 2. Polling data suggest Americans __ the

    asked by Amy

  225. Math

    What does ! mean in an equation? ex) 3! + (6*5) - (5+0)= 31 Well 3! has to equal 6

    asked by Bridgett

  227. physics

    In a World Cup soccer match, Juan is running due north toward the goal with a speed of 7.80 m/s relative to the ground. A teammate passes the ball to him. The ball has a speed of 13.6 m/s and is moving in a direction of 32.5 degrees east of north, relative

    asked by bobjahng

  228. science

    what are some facts about atom's info's and ideas?

    asked by yuku

  229. Math

    My ones digit is 5 more than the tens digit. i am greater than 25 and less than 35.

    asked by Ali

  230. CHemistry

    Use the bond energies given in the "Bond Energy" table (can be gained from google) to estimate the delta Ho for the reaction given below. 2ClF3(g) + 2O2(g) Cl2O(g) + 3OF2(g) I did this: 1530 + 996 - (410 + 570) = 1546. But the answer was wrong. I don't

    asked by Melissa

  231. Seventh Grade Math

    Use 6 digits from 1 through 7, each once, to make two 3-digit numbers whose sum is 670 and whose difference is 376. Give both 3-digit numbers in your answer. If I knew what I had to do, I could solve this problem. I don't know how to begin, though!!!!

    asked by Anonymous

  232. Math

    6*5*0*1*3*9*.5=___

    asked by Bridgett

  233. Physics

    A skydiver has an air resistance force of 1193 N and a mass of 94 kg, what is her current acceleration? Take down to be POSITIVE and use g = 10 m/s/s. Please report your units as "m/s/s"

    asked by keith

  234. Physics

    A skydiver has a terminal velocity of 9.0 m/s. If they have a mass of 98, what is their k value for their air resistance? Use g = 10 m/s/s and do not report units on your answer, they should be N s/m.

    asked by keith

  235. sociology

    Which topics or concepts interested you most in this course? How can you apply them to your life? Were there any topics you would like to explore further?

    asked by Anonymous

  236. Wolrd History AP

    How can u compare the 10 abominations during the Tang Dynasty to Hammurabi's code?

    asked by savanna

  238. 8th grade

    If there were 10 grams of iron and 20 grams of water what would the total amount be?

    asked by Anonymous

  239. science

    explain why the wrong ideas are incorrect about atoms and whu people might have these misconceptions.

    asked by yuku

  240. social studies

    can someone help me start my persuasive essay on vote for amendment 2 2010?

    asked by micheal

  241. General Question

    What are 3 types of innovations excluding writing innovation, art innovation, trade innovation, architectural innovations, and scientific innovations?

    asked by Angeliqua

  242. To Taylor

    Please find a socially acceptable screen name (First Name) before you post again. Thanks. =)

    asked by Writeacher

  243. Physics

    Calculate the radial acceleration of an object at the equator of Jupiter (which takes 0.410 day to spin once), turning with the planet. (in )

    asked by Carmen

  244. Social Studies

    Describe the geographical features of your community or region. How might they have influenced people to settle there?

    asked by Ashley

  245. calculus

    let f(x)= (x-3)^-2 Show that there is no value of c in (1,4) such that f(4)-f(1)= (f prime of c)(4-1). Why doesn't this contradict the mean value theorem.

    asked by Anonymous

  246. Social Studies

    Each European group that set up colonies settled in the specific part of the Americas. What are the two facts that lead to that generalization?

    asked by Ashley

  247. CHEMISTRY..please help..thanks

    The molar heats of fusion and vaporization for silver are 11.3 kJ/mol and 250. kJ/mol, respectively. Silver's normal melting point is 962°C, and its normal boiling point is 2212°C. What quantity of heat is required to melt 13.0 g of silver at 962°C?

    asked by Jasmin

  249. chemistry

    Treatment of gold metal with BrF3 and KF produces Br2 and KAuF4, a salt of gold. Find the mass of the gold salt that forms when a 73.0 -g mixture of equal masses of all three reactants is prepared.

    asked by john

  250. Algebra 2

    Suppose the experimental probability is 1/3 that a carton of eggs contains at least one broken egg. Use the simulation of 20 trials to find the experimental probability that 3 cartons selected at random contain only unbroken eggs.

    asked by bc

  251. 2nd grade math

    I wrote my question wrong - Tell how to make 10 when adding 8+5

    asked by amanda

  252. Physics

    Harry jumps horizontally from the top of a building that is 20.0 m high. He hopes to reach a swimming pool that is at the bottom of the building, 14 m horizontally from the edge the building. If he is to reach the pool, what must his jumping speed be?

    asked by Mallory

  253. Global Issues

    For my pro side on the paper 'should the richer countries of the world help the poorer countries?'I have written about two pages so far. Starting with my introduction, and going in to my first two main points. I just wanted to get it all checked before I

    asked by y912f

  254. chemistry

    If the temperatures of separate 34 g samples of gold, mercury, and carbon are to be raised by 10.0°C. How much heat must be applied to each substance?

    asked by Anonymous

  255. math

    simplify (2h-6)

    asked by G'Woyne

  256. English

    I have to identify if the verb is transitive or intransitive. 1.Eddie must be the fastest runner on the team. 2. We were the largest class in the history of the school. 1.must be=intransitive 2.were=intransitive

    asked by Hayley

  257. statistics

    Given a level of confidence of 99% and a population standard deviation of 12, answer the following: (A) What other information is necessary to find the sample size (n)? (B) Find the Maximum Error of Estimate (E) if n = 78. Show all work.

    asked by Valerie

  258. statistics

    A sample of 134 golfers showed that their average score on a particular golf course was 87.43 with a standard deviation of 4.53. Answer each of the following (show all work and state the final answer to at least two decimal places.): (A) Find the 99%

    asked by Valerie

  260. statistics

    Assume that the population of heights of male college students is approximately normally distributed with mean m of 70.63 inches and standard deviation s of 6.47 inches. A random sample of 88 heights is obtained. Show all work. (A) Find the mean and

    asked by Valerie

  261. statistics

    The diameters of apples in a certain orchard are normally distributed with a mean of 4.77 inches and a standard deviation of 0.43 inches. Show all work. (A) What percentage of the apples in this orchard is larger than 4.71 inches? (B) A random sample of

    asked by Valerie

  262. physics

    which object will have higher inertia a rock of 20kg or a hollow ball of 22kg

    asked by alo

  263. statistics

    A researcher is interested in estimating the noise levels in decibels at area urban hospitals. She wants to be 90% confident that her estimate is correct. If the standard deviation is 4.13, how large a sample is needed to get the desired information to be

    asked by Valerie

  264. physics

    A pitched ball is hit by a batter at a 45° angle and just clears the outfield fence, 107 m away. If the fence is at the same height as the pitch, find the velocity of the ball when it left the bat. Ignore air resistance.

    asked by malcolm

  265. Physics

    A spring that has a force constant of 1100 N/m is mounted vertically on the ground. A block of mass 1.90 kg is dropped from rest from height of 1.65 m above the free end of the spring. By what distance does the spring compress?

    asked by Pranav

  266. English/Grammar

    Hello - I am having trouble with verbs and linking verbs...can you tell me if these are correct? I also have to pick out the predicate noun/adjective. 1. In northern Canada, the countryside seems peaceful. (LV= seems, PA = peaceful) 2. The mountain air

    asked by Sasha

  267. english

    please help me with this. it's an essay question that i'm really stuck on based on romeo and juliet. please help!!! thanks what are some decisions Romeo had to make that could possibly decide his fate, and how are his decidion-making skills in the first

    asked by Anonymous

  268. 9th grade

    What is the total supply for US - silk, coffee, or bananas or all of them?

    asked by sue

  269. To Theresa

    In your post asking for someone to critique your writing, you included far too much personal information. It's just not safe to do that online. Please repost, but put fake information in place of your name, address, etc. Thanks.

    asked by Writeacher

  271. English

    I have a few question on linking verbs: 1. I am fond of both kinds of comics. linking verb - fond? 2. Joseph Pulitzer was the first to publish color funnies. linking verb - was? 3. The sales of his newspaper were high. linking verb - sales 4. Sunday

    asked by Emily

  272. English

    What is an essay-style question, and how would I write one about a book I read? I don't have to answer the question

    asked by Lala

  273. math 5th grade

    Write each percent as a reduced fraction. 35% and 65% would be 35/100 and 65/100 am I correct that these can not be reduced any further?

    asked by Jill

  274. trig

    cotx/secx-tanx

    asked by sady

  275. Chemistry

    A single mole of AgNo3 weighs 169.88 grams. In order to make a 1M solution, how many grams of AgNo3 would need to be dissolved in 5oomL?

    asked by Jazz

  276. thinking

    Explain sensing process thinking

    asked by Anonymous

  277. english-ms.sue or writateacher possibly help?

    so, i posted an essay question like 10 minutes ago, it's under anonomys though cause i forgot to put my name, anyway, i started the intro to the essay: Blue or green? Long or short? Yes or no? At some point in your life, you will face a time where you need

    asked by amy

  278. 7th Grade world Civics

    What is the order of the courts from Highest of Authority to lowest of Autihoruty: court of international trade, U.S District courts, U.S. tax Courts,U.S court of Appeals, Bankruptcy Courts, Coourts of Veteran Appeals, Military Courts, Supreme Courts,

    asked by Jacytiopa

  279. Western Experience

    why did the United States become so fearful of the Soviet Union after 1945? Why was the Soviet Union so fearful of the United States?

    asked by Kim

  280. algebra

    Dean is 1/4 that of Emily. In six years Emily will be two times older than Dean. How old is Dean?

    asked by Robert

  282. 5th grade math

    Write 0.7 and 0.21 as factors, then multiply the factors change the product to a decimal 7/10 x 21/100 = 147/10,000 decimal would be .0147 Would that be correct?

    asked by Jill

  283. PHYSICAL SCIENCE

    WHAT IS THE KINETIC ENERGY OF A BALL WITH THE MASS OF 5KG ROLLING AT 10M/S

    asked by TRISHA

  284. physics

    express the angular velocity of the second hand on a clock in rev/hr

    asked by pedro

  285. CHEMISTRY..please help..thanks

    The molar heats of fusion and vaporization for silver are 11.3 kJ/mol and 250. kJ/mol, respectively. Silver's normal melting point is 962°C, and its normal boiling point is 2212°C. What quantity of heat is required to melt 13.0 g of silver at 962°C?

    asked by Jasmin

  286. college algebra HELP

    How long does it take for a deposit of $1400 to double at 10% compounded continuously?

    asked by samantha

  287. 8th grade

    why did zorna pour ketchup on her brother's hand

    asked by joseline

  288. 7th grade

    What is 7540 over 94710 in simplist form?? Please Help! I am terrible at math!

    asked by Rella

  289. Math

    How does this (a) equal to : 326^2 - 0 = 2(a)(0.83) a = 64,022 m/sec^2 My calculations do not seem to be coming out properly what so ever if we are solving for 2a I believe.

    asked by Reema

  290. physics

    Find the angular speed of the Earth as it spins about its axis. Give your result in rad/ses

    asked by pedro

  291. english-PLEASE HELP

    i need help writing a thesis statement for an essay. the topic is this: use an example from romeo and juliet, write and essay analyzing Romeo's decision-making abilities at this point in the play. also, include a tough decision you have had to make and

    asked by amy

  293. Western Experience

    Why did the tide of WW2 began to turn in favor of the allies in 1942?

    asked by Kim

  294. Spelling

    would "supply" follow the vcccv pattern?

    asked by Mariah

  295. Maths B

    Hi, i was just wondering if you could help me with how to work out this question, as i have attempted and get a bit confused at the end. here it is: A cylinder is inside a sphere- the sphere has a radius of R. What is the maximum volume of the cylinder?

    asked by Jess

  296. 8th grade math

    How do you find the y-intercept in a graph, equation, and table?

    asked by john

  297. 5th grade

    which of the fractions are bigger 5/16 or 1/2 or 1/4 or 7/16

    asked by BOPIY

  298. physics

    65.0-kg person throws a .045kg snowball forward with a ground speed of 30.0 m/s. a second person with a mass of 60.0-kg catches the snowball. both people are on skates. the first person is intially moving forward wit ha speed of 2.50 m/s and the second

    asked by bailey

  299. algebra HELP ASAP

    If $13,000 is deposited in a bank account paying 6% compounded quarterly, what amount will be in the account after 8 years? How much interest will be earned during the 8 years? The amount after 8 years will be $___ How much interest will be earned during

    asked by samantha

  300. Global History

    How has the scientific method impact our understanding of the world and the way we study it?

    asked by karla

  301. calculus

    Find all numbers b such that the average value of f(x)=2+6x−3x^2 on the interval [0,b] is equal to 3. Give your answer as a list of numbers, e.g., {1,2,3}.

    asked by baby

  302. world history

    how do i do a report that is due in 2 day that is on the 5 themes of geography and has to do with a current event i need help and i am having a break down how can i work like this HHHHHEEEEEELLLLLLLPPPPPPP ME

    asked by heidi

  304. 5 th grade

    What is the median fo the following set of numbers? 404,650,585,435,680,342,798 please! show me the work. thank you!

    asked by pat

  305. operational management

    Activity Time Predecessor(s) A 3 None B 4 A C 3 B D 5 B E 10 C, D F 3 E G 6 E H 5 G, F Please assist with finding the ES, EF, LS, LF and slack time for ALL activities. also, the critical path? and, the project completion time?

    asked by Jessica

  306. physics

    The instruments attached to a weather balloon in the figure below have a mass(m) of 5.0 kg. The balloon is released and exerts an upward force(F) of 92 N on the instruments.

    asked by eden

  307. pre cal

    find the exact value of tan(2sin-1 3/5)

    asked by Anonymous

  308. english-to writeacher

    thanks for helping me, just saying

    asked by amy

  309. statistics

    if the mean of a normally distributed set of data is 100 and the standard deviation is 10, a z score of 2 corresponds to raw value of?

    asked by g

  310. science

    what can an element's osition in the periodic tabletell you about it's relationship to other elements in the periodic table?

    asked by teagan

  311. 8th grade

    98x^2-32y^2

    asked by Sarah

  312. Integration

    1. [integration] (3x+7sin(x))^2 dx i tried 3 different methods of integration but all of my answers are wrong. 2. [Integration]from 0 to 5 (3w-3)/(w+6)dw i divided the numerator by the denominator and then tried to solve the question but im getting the

    asked by AY

  313. Global Issues

    So no one's helping me with my paper, I already posted twice. But I figured out everything myself and fixed it to the best of my capability. Can I atleast get some help with the conclusion?? Should the Richer Countries of the World help Poorer Countries

    asked by y912f

  315. 5th grade

    estimate the answer 189,103+504,200=693,303 estimate would= 600,000 0R 70,000? which number shows 90 millions, 7 hundred thousands, 5 thousands, one hundred and 4 ones? A.90,750,104 or B.90,705,104 ?

    asked by pat

  316. 5th grade

    how does a double line graph looks

    asked by alania

  317. Physics

    If a chain of 30 identical short springs linked end-to-end has a stiffness of 420 N/m, what is the stiffness of one short spring? Okay, I don't understand how you would get N/m if they are linked together. Can you explain how you would get the answer?

    asked by Starfallen

  318. Debate: Policy

    I'm trying to find articles and information about the U.S. Armed Forces. I've been trying to find some info for hrs. could you send me some links to websites that could help me? THANKS.

    asked by Jessica

  319. math

    Would 147/10,000 be .0147 written as a decimal?

    asked by Jill

  320. Physical Science

    Water,Shampoo,and Milk's pH are tested neutral. Why is this a good thing?

    asked by Elizabeth

  321. CHEMISTRY

    Given that the specific heat capacities of ice and steam are 2.06 J/g°C and 2.03 J/g°C, the molar heats of fusion and vaporization for water are 6.02 kJ/mol and 40.6 kJ/mol, respectively, and the specific heat capacity of water is 4.18 J/g°C, calculate

    asked by Riley

  322. chemistry

    why does 2 mole NaOH react with 1 mole HCl in titration?

    asked by Mary

  323. 10th grade

    calculate the mass of the water of hydration if a hydrate loses 0.025 mol of H2O when heated

    asked by Sherry

  324. Business Math

    A company purchased an air conditioning system for $10,200. Shipping charges on the system are $875. Setup costs were $1,250. The system is expected to last for 5yrs and has a residual value at $2000. If I use the straight-line method to calculate

    asked by CC

  326. Chemistry

    A compound contains only nitrogen and hydrogen and is 87.4% nitrogen by mass. A gaseous sample of the compound has a density of 0.977 g/L at 680. torr and 84.1°C. What is the molecular formula of the compound?

    asked by EM

  327. math

    A tree casts a shadow 8 ft long. A 6 ft man casts a shadow 4 ft long. The triangle formed by the tree and it's shadow is similar to the triangle formed by the man and his shadow. How tall is the tree?

    asked by Anonymous
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