Posts by James

Total # Posts: 2,601

  1. Calculus

    Write the integral in one variable to find the volume of the solid obtained by rotating the first-quadrant region bounded by y = 0.5x^2 and y = x about the line x = 5.
  2. Physic (store energy)

    i want to know the answer first
  3. Physics

    Question 22 Unsaved If the gravitational force exerted by the Moon on an astronaut landed on the Moon is 113.6 N, what is the mass of the astronaut?
  4. Physics

    200 Newton and 1 meter along the board
  5. Math

    .Over a 24-hour period, the temperature in a town can be modeled by one period of a sinusoidal function. The temperature measures 70°F in the morning, rises to a high of 80°F, falls to a low of 60°F, and then rises to 70°F by the next morning. What is the ...
  6. chemistry

    a student accidentally mixed sodium carbonate an calcium carbonate. state how he would obtain pure sodium carbonate from the mixture
  7. social studies

    A d
  8. English

    In “who knows if the moon’s,” what is the moon seen as? (1 point) a city a balloon a cloud a sailboat
  9. Math

    An examination fee is partly constant and partly varies directly as the number of subject entered. When the examination fee is 55000 three subjects are entered when that examination fee is 700, five subjects are entered. Write a law of variation and find the number of subjects...
  10. math

    Palo Alto College is planning to construct a rectangular parking lot on land bordered on one side by a highway. The plan is to use 560 feet of fencing to fence off the other three sides. What dimensions should the lot have if the enclosed area is to be a? maximum?
  11. Math

    The minute hand of a clock is 6cm far does the end of the hand travel in 35minute
  12. Math

    For a constant area, the length of a rectangle varies inversely as its width. The length of a rectangle is 27 ft when the width is 10 ft. Find the width of a rectangle with the same area if the length is 18 ft.
  13. math

    Blake and Luke can paint a room in 15 hours. Luke can paint the room by himself in 25 hours. How long does it take Blake to paint?
  14. Maths

    What does the term adaptation mean? how does adaptation explain the patterns of distribution of plant and animal species in the world? I need help.. Can someone give me the answer? Thanks.. :3
  15. math

    Solve the following equation for B: A=[h(b+B)]/2
  16. Math calculus 2

    Find the volume of the solid generated by revolving the region enclosed by the curves y=5*(sqrt(x)), y=0, and x=2 about the line x=9.
  17. math

    Abigail lives in an off-campus apartment. Some days she rides her bike to campus, other days she walks. When she rides her bike, she gets to her first classroom building 36 minutes faster than when she walks. If her average walking speed is 3 mph and her average biking speed ...
  18. math

    Solve: {(3r+s)/(10r^2-3rs-s^2)}+{(2r-s)/(2r^2+rs-s^2)}
  19. Math

    Solve: ((3/n)-(2/m)) ------------------------ (9m^2)-(4n^2) ----------------- mn ----- AND / = fraction bars
  20. Chemistry

    How many grams of Na2SO3 (Sodium Sulfite) must be added to 225 mL of 0.0777 M sulfurous acid (H2SO3) to prepare a buffer at pH = 7.4000? H2SO3 has a pKa1 = 1.857 and pKa2 = 7.172.
  21. Math

  22. history

    thank youuuuuuuuuu!
  23. history

  24. history

    Define the term “Cold War”. Why were both the Soviet Union and the United States fearful of starting an outright war with each other? Detail one event or situation that brought both sides close to nuclear war. (Ex. Cuban Missile Crisis)
  25. Please help MATH

    thank you !!!
  26. Please help MATH

    james is taking a test in his geomtery class. His teacher asked him to determine the equation of the line perpendicular to the line 2x-y=-3 and passing through the point (8,2) , which line should he choose. A. y+ 1/2x=6 B.y+2x=18 C. y-2x=-14 D. y +1/2x=9
  27. math

    In 2010 the birthrate in a certain country increases from 11*(e^(0.04*t)) million births per year to 16*(e^(0.04*t)) million births per year, where t is the number of years since January 1, 2010. Set up the integral and find the projected increase in population that would ...
  28. Calc 3

    Describe the locus of points in R3 equidistant from the origin (0, 0, 0), and the plane x + y + z = 1.
  29. physics

    An electric wheel chair is designed to run on a singe 7-V battery rated to provide 87-Axh. If the wheelchair experiences an average total retarding force (mainly friction) of 150-N, how far in meters can the wheelchair travel in one charge?
  30. Math

  31. University Organic Chemistry

    Lab questions to Diels Alder butadiene experiment : Why do the anhydride groups of the maleic anhydride reactant help the Diels-Alder reaction go faster? Why does the diene need to be in the s-cis conformation to give the cyclic product? Why is it not possible for the Diels-...
  32. University Genetics part 2

  33. Pre Calc

    Use the Pythagorean identities rather than reference triangles . Find tan? and cot? if sec? = 5/2 and sin? <0. Please help ! Much appreciated !!
  34. biology

    does 1 gene code for 1 trait? explain
  35. math

    (3x^3+ 5x^2– 11x + 3) ÷ (x + 3) – (x + 2)(3x – 5) is the answer -5x+11?
  36. Mathermatics 2

    Plot three points with second coordinate Equal to (1.3) and join them.
  37. geography help

    What factors are contributing to a aging popluation?
  38. Calculus

    I just need help with one question. A bacteria population starts with 500 bacteria and grows at a rate of r(t) = 548e^(6.5t) bacteria per hour. Determine the number of bacteria after 1 hour. Thank you!
  39. Calculus

    Awesome, thank you! There is one more part to this question I need help with. I tried figuring it out but the number of bacteria I calculated didn't make any sense. It says to determine the number of bacteria after one hour.
  40. Calculus

    I need some help with this Calculus problem. A bacteria population starts with 500 bacteria and grows at a rate of r(t) = 548e^6.5t bacteria per hour. A. Determine the function P(t) which gives the population at time t. C. How long does it take the initial population to triple...
  41. Physics! Help!

    Two planets of mass 3 x 1025kg are release from rest 1.5 x 1012 m apart. What is the speed of the planets when they are half this distance apart? Help! I've been stuck on this for a good bit! I cant seem to find a formula that can help me solve this! I can find the force ...
  42. Science

    THX Venus I got %100 on my Measuring Matter quiz!
  43. Social Study 6th

    Who suffered the most from the crowding in the city? the people already living in the city; the people still living in the country; the new arrivals from the country; government officials
  44. PHYSICS! -need help!-

    A proton of mass m undergoes a head on collision with a stationary atom of mass 20m. If the initial speed of the proton is 485 m/s, find the speed of the proton after the collision.
  45. Global Studies

    ty ms.sue even tho i could've just googled it but i got addicted to this website :)
  46. Global Studies

    1)Why did Hitler killed jewish people ? 2)How many jewish people were killed during World War 2?
  47. math

    If 2 adult tickets and 1 child ticket cost $8 and if 1 adult ticket and 3 child tickets cost $9, what is the price of each ticket
  48. chemistry

    which is the container
  49. math

    write a two column proof for this Given:QR||TU , S is the midpoint of QT Prove: /\ QSR=~/\TSU /\ IS the triangle sign =~ is the congruent symbol
  50. math

    Write a 2-column proof Given: RS=~TS, V is the midpoint of RT Prove: /\RSV=~/\TSV /\ is the triangle sign
  51. math

    Which ordered pair is a solution to the equation y = 13 ? x?
  52. Computer Programming

    That link wasn't helpful but thanks
  53. Computer Programming

    Create the psuedocode for an application class named Monogram. Its main() method holds three variables that hold your first, middle, and last initials, respectively. Create a method to which you pass the three initials and that displays the initials twice—once in the ...
  54. Algebra

    Find an equation of the line passing through the points (2,3) and (6,-3)
  55. Language Arts

  56. latin 1

    dominus me amat. dominus me amat quod vitam fili servabam.sum xeno; romae ( in rome) sum sextus. mox liber (free)ero.
  57. Calculus

    1) A particle is moving along the x-axis so that its position at t ? 0 is given by s(t) = (t)In(2t). Find the acceleration of the particle when the velocity is first zero. 2) The driver of a car traveling at 50 ft/sec suddenly applies the brakes. The position of the car is s(t...
  58. Middle East

    In what way the role of women has changed in the history of the Middle East?
  59. Physics

    A skateboarder with an initial speed of 3.1-m/s, rolls virtually friction free down a straight incline of length 18-m in 3.2-s. At what angle (in degrees) is the incline oriented above the horizontal?
  60. Physics

    A wet bar of soap slides down a ramp 5.3-m long inclined at 4.9o. How long (in seconds) does it take to reach the bottom, assume the coefficient of kinetic friction is 0.04.
  61. Physics

    I keep getting the wrong answer. i must be putting it in my calculator wrong.
  62. Physics

    A car can decelerate at -3.36-m/s2 without skidding when coming to rest on a level road. What would its deceleration (in m/s2) be if the road is inclined at 8.6o and the car moves uphill? (Assume the same static friction coefficient.
  63. Physics

    A small box is held in place against a rough vertical wall by someone pushing on it with a force directed upward at 25o above the horizontal. The coefficients of static friction and kinetic friction between the box and wall are 0.21 and 0.51, respectively. The box slides down ...
  64. math

    Can someone help i don't understand
  65. math

    I don't get it. Do you right an equation?
  66. Calculus

    a solid has as its base the region bounded by the curves y = -2x^2 +2 and y = -x^2 +1. Find the volume of the solid if every cross section of a plane perpendicular to the x-axis is a trapezoid with lower base in the xy-plane, upper base equal to 1/2 the length of the lower ...
  67. Math

    @ bobpursley no the question did not specify
  68. Math

    What can you say about sets A and B if you know that. 1)A U B = A? 2)A n B = A? 3)A - B = A?
  69. science

    which part of a plant cell is made of cellulose
  70. feasibility study on banana plantation in nigeria

    feasibility study on banana plantation in nigeria
  71. Chemistry

    The density of palladium (Pd) is 12.0 g/mL and the cell volume is 5.89???10^?23 mL. Determine the number of atoms in the unit cell. (Because there cannot be a part of an atom in a unit cell, we must round the number of atoms to the nearest whole number.)
  72. math

    An apartment building has 15 apartments in it. The tenant association is having a hard time collecting the fees from the tenants with an 0.6 probability of a tenant paying their fees. What is the probability of tenant association collecting fees from 11 out of the tenants ? ...
  73. math

    analysis of another rock shows that it contains 60% of its original element; the other 40% decayed into lead. How old is the rock ?
  74. College Physics

    1. A construction worker tosses a hammer straight up to a co-worker who is working on a platform above him. The hammer leaves his hand at 7.26 m/sec, and travels 3.33 meters upward, at which point it is caught by the worker on the platform. (It is caught while still moving ...
  75. Physics

    A construction worker tosses a hammer straight up to a co-worker who is working on a platform above him. The hammer leaves his hand at 7.26 m/sec, and travels 3.33 meters upward, at which point it is caught by the worker on the platform. (It is caught while still moving upward...
  76. Maths

    Round 5,000.083 to three significant figure.
  77. MATHS

    A chord 20cm long is 12cm from the center of a circle calculate, correct to one decimal place
  78. chemistry

    The reaction of hydrochloric acid and sodium hydroxide is exothermic HCl +NaOH --> NaCl + H2O In one experiment, a student placed 50.0 mL of 1.00 M HCl at 25.5 oC in a coffee cup calorimeter. To this was added 50.0 mL of 1.00 M NaOH solution, also at 25.5 oC. The mixture ...
  79. chemistry

    The reaction of hydrochloric acid and sodium hydroxide is exothermic HCl +NaOH --> NaCl + H2O In one experiment, a student placed 50.0 mL of 1.00 M HCl at 25.5 oC in a coffee cup calorimeter. To this was added 50.0 mL of 1.00 M NaOH solution, also at 25.5 oC. The mixture ...
  80. Economics(help!!!)

    A monopolist is deciding how to allocate output between two markets that separated geographically. Demands for the two markets are P1=15-Q1 and P2=25-2Q2.The monopolist's TC is C=5+3(Q1+Q2).What are PRICE,OUTPUT,PROPISTS, MR if a)the monopolist can price discrinate? b)the ...
  81. economics

    Define utility using mathmatical expression.
  82. Micoeconomics

    Explain the profit maximation conditiond of multi plant monoplist?
  83. maths for business Help!!!

    Jacson purchased a house for Birr 50,000. He made an amount of down payment and pay monthly Birr 600 to retire the mortage for 20 years at annual interest rate of 24% compounded monthly. Find mortage down payment interest charged percentage of down payment to selling price.
  84. Math

    A real estate salesperson bought promotional calendars and date books to give to her customers at the end of the year. The calendars cost ?$0.750.75 ?each, and the date books cost ?$0.500.50 each. She ordered a total of 500500 promotional items and spent ?$275275. How many of ...
  85. Math

    I want to know how to solve this problem7/8×16/21
  86. Mathematics

    A cube is divided into six identical square pyramids, each with a perpendicular height (s) that is half the length of the base edge (2s). Show that the volume of each pyramid is one third the volume of a square prism with the same base edge and perpendicular height.
  87. Statistics

    if 5 dice are thrown find the probability that at least 3 of them will turn up 6
  88. Science

    Acceleration due to gravity on planet mercury 3.7m/s.what would the mass of a person weighing 637 n on mercury
  89. Stat

    A squad is made up of 10 privates and 5 privates ?rst class. (a) In how many ways can a detail of 4 privates and 2 privates ?rst class be formed?
  90. Statistics

    the probability that A hits a target is 1/4 and the probability that B hits the target id 1/3. if each fires once and the target is hit only once, what is the probability that A hit the target?
  91. Stat

    4 different letters are dropped on the floor and then inserted into four differently addressed envelopes. Find the probability that exactly 2 letters are inserted into the proper envelope.
  92. word problem

    The admission for a school play is $3.50 for children and $9.00 for adults. on a certain day, 312 people attended the play, and the total money collected from sales was $1884. How many children and how many adults were admitted?
  93. word problem

    thank you
  94. word problem

    I have no clue on how to set up this equation please help. A car rental company offers two plans for renting a car. Plan A:21 dollars per day and 18 cents per mile Plan B:25.44 dollars per day and 15 cents per mile If you plan to rent the car for one day. and "m" ...

    Use the atomic weight of carbon and chlorine to determine the theoretical value of the molecular weight of CH3OH Or methanol.( atomic weights (c=12, cl=35.5).
  96. English

    i thought same thing first ty
  97. English

    is point of view a literary element or literary technique?
  98. English help

    Hey there! Do you still in need for the expository composition? I had to write something similar and all the time I postponed doing it due to the various reasons. The friend of mine told me about Marvelous essay service. You may ask for the help there.
  99. History

    I completely agree with Reed. I guess there is more information to extend your essay and to prove your points. Have you tried to search for more information? You may also get the professional help by using the online writing service. I use Marvelous essays site and I think ...
  100. maths

    Three numbers are in the ratio 1:3:4. If the difference between the two smaller ones is 10, what are the numbers?
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