Questions Asked on
March 24, 2014

  1. Precalculus

    The height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. When graphed, the function gives a line with a slope of -0.4 . Suppose that the height of the candle after 13 hours is 24.8 centimeters. What

    asked by Joey
  2. math

    The wholesale cost of a video game is $459.45. The original markup was 51% based on selling price. Find the final sale price after the following series of price changes: a markup of 24%, a markup of 17%, and a markdown of 10%.

    asked by bunny
  3. Statistics

    Twelve different video games showing substance use were observed and the duration times of game play ( in seconds) are listed below. The design of the study justifies the assumption that the sample can be treated as a simple random sample. use the data to

    asked by Angel
  4. English 10th grade

    This is confusing to me: "Truth, Sekhar reflected, is like the sun. I suppose no human being can ever look it straight in the face without blinking or being dazed. He realized that, morning till night, the essence of human relationships consisted in

    asked by Sandra
  5. Math

    Given the following function, choose the graph with the two possible angles with the domain 0 < or = to theta < or = to 360 degrees. Sec(theta)= -13/5

    asked by Anonymous
  6. physics please help!!

    A diver stands on the end of a diving board as shown in the figure on the right. The mass of the diver is 58 kg and the mass of the uniform diving board is 35 kg. Calculate the magnitudes and directions of the forces exerted on the board at the points A

    asked by Bobby
  7. college physics

    During a circus act, an elderly performer thrills the crowd by catching a cannon ball shot at him. The cannon ball has a mass of 10.0 kg and the horizontal component of its velocity is 8.00 m/s when the 65.0-kg performer catches it. If the performer is on

    asked by Mohanad
  8. Physics

    A diver stands on the end of a diving board as shown in the figure on the right. The mass of the diver is 58 kg and the mass of the uniform diving board is 35 kg. Calculate the magnitudes and directions of the forces exerted on the board at the points A

    asked by Bobby
  9. Physics

    A railroad car with a mass of 12000 kg collides and couples with a second car of mass 18000 kg that is initially at rest. The first car is moving with a speed of 9 m/s before collision. If external forces can be ignored, what is the final speed of the two

    asked by Amanda
  10. Chemistry

    Acetylene(C2H2) torches are used in welding. How much heat (in kJ) evolves when 2.0L of C2H2 (d=1.0967kg/m3) is mixed with a stoichiometric amount of oxygen gas? The combustion reaction is C2H2(g)+52O2(g)→2CO2(g)+H2O(l), ΔH∘=−1299.5kJ

    asked by Kelly
  11. Finance

    Cochrane, Inc., is considering a new three-year expansion project that requires an initial fixed asset investment of $1,860,000. The fixed asset will be depreciated straight-line to zero over its three-year tax life, after which time it will be worthless.

    asked by Alec
  12. physics

    a wheelof diameter 0.70 meterolls without slipping. a point at the top of the wheel moves with a tangential speed of 2.0 meter/second. a) at what speed is the axis of the wheel moving? b) What is the angular speed of the wheel?

    asked by Anonymous
  13. english

    i need help with chapter 10 and 11 sentence check 2

    asked by jenny
  14. Physics( Explain and choose right answer)

    A ball on the end of a rope is moving in a vertical circle near the surface of the earth. Point A F T is at the top of the circle; C is at the bottom. Points B and D are exactly halfway between A and C. Which one of the following statements concerning the

    asked by Dan
  15. math

    One day, the temperature outside increased by 6/10 every hour for seven hours. How much did the temperature increase that day?

    asked by andrew
  16. Math

    Convert theta = 225° to rectangular form. A) y = -1 B) y = 1 C) y = x D) y = -x E) x = -1

    asked by Anonymous
  17. Financial

    Cochrane, Inc., is considering a new three-year expansion project that requires an initial fixed asset investment of $1,860,000. The fixed asset falls into the three-year MACRS class (MACRS Table). The project is estimated to generate $1,950,000 in annual

    asked by Alec
  18. social studies

    According to Tardiff and Brizee, an essay that makes a claim supported by evidence is classified as an _______ essay. A. expository B. analytical C. argumentative D. explanatory My answer is A

    asked by phia
  19. math

    Carlos invested his savings in two investment funds. The amount he invested in Fund A was $8000 less than the amount he invested in Fund B. Fund A returned a 8% profit and Fund B returned a 4% profit. How much did he invest in Fund B, if the total profit

    asked by Kori
  20. college chem 2

    The enthalpy of vaporization of liquid diethyl ether is 26.0kJ/mol at 35'C calculate the deltaS' for vapor to liquid

    asked by shel
  21. Physics

    The drawing shows an equilateral triangle, each side of which has a length of 2.20 cm. Point charges are fixed to each corner, as shown. The 4.00 µC charge experiences a net force due to the charges qA and qB. This net force points vertically downward and

    asked by Joe Santhosh
  22. social studies

    Alice and Andrew are discussing thesis development. Alice argues that a topic becomes a thesis if we want to write about the topic. Andrew, on the other hand, maintains that a topic is not a thesis but that a thesis is the foundation of a topic. Who is

    asked by phia
  23. Trigonometry

    Graph the function y=2sin(x-2pi/3). To draw the graph, plot all x-intercepts, minima and maxima within on period. I need to graph at least 5 points. I have -pi, 0, pi, 2pi, 3pi, and 4pi along the x-axis

    asked by Shelby
  24. Algebra

    Which expression gives the solutions of –5 + 2x² = –6x?

    asked by Sandra
  25. Math

    Inventory cost at Tech Co. is 35 percent per year. What is the per unit inventory cost for an MP3 player sold at $50? Assume that the margin corresponds to the retailer's average margin.

    asked by Kelbo
  26. math

    Sonya spent 2/5 of her money and then had $18 left. How much money did Sonya originally have?

    asked by Anonymous
  27. social studies

    In a biography, all of the following would be a primary source except for which one? A. A telegram sent to the subject by a friend B. An essay written about the subject by a former colleague C. The personal testimony of the subject’s widow, gathered in

    asked by phia
  28. Business & Economics

    For the most recent seven years, the U.S. Department of Education reported the following number of bachelor's degrees awarded in computer science: 4,033; 5,652; 6,407; 7,201; 8,719; 11,154; 15,121. What is the annual arithmetic mean number of degrees

    asked by Student5
  29. Englisj

    In Langston Hughes poem, Dreams, Would using a simile rather than a metaphor Negate or weaken Hughes' poem?

    asked by Anonymous
  30. math

    patterns with fractions write a rule for the sequence.then,find the unknown number how do you do this?ill give you an example...1/2, 2/3, 1, 1 1/6.it says,think:the pattern is increasing.add 1/6 to find the next term.here is a problem.... 1 3/8, 1 3/4, 2

    asked by maria
  31. Physics

    A ladder, 5.0 m long, leans against a frictionless wall at a point 4.0 m above the ground. A painter is climbing up the ladder. The mass of the ladder is 12.0 kg and the mass of the painter is 60.0 kg. The ladder begins to slip at its base when the painter

    asked by Richard
  32. Math

    hope's mom baked a cake for hope's birthday. It is in the shape of a rectangle 10 inches long and 6 inches wide. If she starts at one corner and puts a candle every 2 inches, how many candles will fit around the edge of the cake?

    asked by Maya
  33. science

    True or False: One of the skin’s functions is to produce vitamin D (1 point) True False 2. Your _____ is the largest organ of your body. (1 point) brain large intestine skin lungs 3. The _____ is the outer, thinnest layer of your skin. (1 point) fatty

    asked by bob varen
  34. Math

    For z1 = 4cis (7pi/6) and z2 = 3cis(pi/3), find z1 * z2 in rectangular form.

    asked by Anonymous
  35. stats

    X is normally dsitributed with mean 250 and standard deviation 40. what value of X does only top 15% exceed?

    asked by Anonymous
  36. please help asap!

    A ladder, 5.0 m long, leans against a frictionless wall at a point 4.0 m above the ground. A painter is climbing up the ladder. The mass of the ladder is 12.0 kg and the mass of the painter is 60.0 kg. The ladder begins to slip at its base when the painter

    asked by Bobby
  37. science question?

    can someone explain this to me what does location has to do with wind energy availability

    asked by matt
  38. College Physics

    The point charges in Figure 17.41 are located at the corners of an equilateral triangle 25.0 cm on a side, where qb = +12.0 µC and qc = -4.50 µC. (Assume that the +x-axis is directed to the right.) (a) Find the electric field at the location of qa.

    asked by Samuel
  39. trig

    Find csc(theta), tan (theta), and cos (theta), where theta is the angle shown in the figure. Give exact values, not decimal approximations c=10 b=7 a=7.14 the right angle is locate between sides a and b and the theta angle is an acutle angle sides b and c.

    asked by Joey
  40. math

    Mr. Gonzalez's sixth-grade class is putting on a play. He reserved the first 6 rows of the auditorium for family members and friends of the 24 students in his class. If each row contains 17 seats and each student can invite the same number of guests, how

    asked by mon
  41. ps 65

    Susan ate part of pizza.She ate more than 1/3 of the pizza. How much of pizza might Susan have eaten?

    asked by susan
  42. physics

    A car moving with an initial speed v collides with a second stationary car that is 46.0 percent as massive. After the collision the first car moves in the same direction as before with a speed that is 37.7 percent of the original speed. Calculate the final

    asked by Sami
  43. Chemistry

    Arsenic acid (H3AsO4) is a triprotic acid with Ka1 = 5 ✕ 10-3, Ka2 = 8 ✕ 10-8, and Ka3 = 6 ✕ 10-10. Calculate [H+], [OH ‾ ], [H3AsO4], [H2AsO4‾ ], [HAsO42 ‾ ], and [AsO43 ‾ ] in a 0.16 M arsenic acid solution.

    asked by Damian Clarke
  44. Math - PreCalc (12th Grade)

    Which equation represents a hyperbola whose foci lie at (2, 7) and (2, -3)?

    asked by Anonymous
  45. Physics( Explain and choose right answer)

    A 3 kg cat sitting on a 1.5 kg piece of cardboard on a frozen lake wants to jump to shore without touching the ice. If there is no friction between the cardboard and the ice, when the cat jumps. the cardboard will move in the opposite direction with a

    asked by Dan
  46. statistics

    assume that blood pressure readings are normally distributed with a mean of 111 and standard deviation of 7. A researcher wishes to select people for a study but wants to exclude the top and bottom 10 percent. What would be the upper and lower readings to

    asked by jessica
  47. chemistry

    Distilled water normally contains dissolved CO2. When preparing NaOH standard solutions, it is important to use CO2 free distilled water. How does dissolved CO2 in distilled water affect the accuracy of the determination of a NaOH solution’s

    asked by anonymous
  48. math

    The position of an object moving in a straight line is given by the function , where s(t) represents distance traveled and t represents the time the object has been in motion. How long (to the nearest tenth) will it take the object to move 17 meters?

    asked by Emmanuel
  49. Math - PreCalc (12th Grade)

    How many different basketball teams of 5 players can be created from a group of 7 players?

    asked by Anonymous
  50. math

    Layne sends an email to 7 people and those 7 people send the email to 7 more people, and so on. Write an expression to show the number of people who will receive the email after the fifth round.

    asked by mon
  51. math

    The wholesale cost of a video game is $459.45. The original markup was 51% based on selling price. Find the final sale price after the following series of price changes: a markup of 24%, a markup of 17%, and a markdown of 10%.

    asked by bunny
  52. Treaty of Paris, quick question, thanks! ☺

    Treaty of Paris was the impetus for __________ recognition of the United States as an independent nation. a.Spain’s b.Britain’s c.Germany’s d.None of the above Thanks! ☺ ~katt

    asked by imissbobby♥
  53. Physics

    Water is boiled by burning coal. The resulting steam blows agains huge turbine blades. The turning blades spin in a magnetic field, producing electricity. Describe in order the energy conversions.

    asked by Catherine
  54. Physics

    A wooden crate sits on the floor of a flatbed truck that is initially at rest, and the coefficient of static friction between the crate and the floor of the truck is 0.25. The driver of the truck wants to accelerate to a velocity of 20 m/s within 4.0 s. If

    asked by Lauren
  55. U.S History DBQ - need help to check my answer!!!

    Document A: Andrew Jackson’s Bank Veto Message to Congress, July 10, 1832 Of the twenty-five directors of this bank, five are chosen by the government and twenty by the citizen stockholders. … It is easy to conceive that great evils to our country and

    asked by Cassidy
  56. Physics

    An Atwood's machine consists of two crates of different masses. If the pulley is frictionless and massless along with a string of negligible mass, find the acceleration of the crates and the tension in the string

    asked by Lauren
  57. Algebra

    A box shaped like a rectangular prism has a height of 17 in and a volume of 2,720 in³ The length is 4 inches greater than twice the width. What is the width of the box? • –10 in • 8 in • 20 in • 40 in

    asked by Sandra
  58. physics

    A compact disk player has just been turned off. A disk decelerates uniformly from an initial angular velocity of 7.90 rev/s. The disk rotates through 5.50 revolutions before coming to rest. What is the tangential acceleration of a point on the disk 5.05 cm

    asked by Anonymous
  59. physics

    A bookshelf is at rest in a room. A force of 35.0 newtons is applied to a bookshelf. If the floor imparts a frictional force of 2.90 newtons, what is the net force acting on the bookshelf?

    asked by corey
  60. Chemistry

    A 3.0g sample of NaCl is added to a Styrofoam cup of water, and the change in water temperature is 6.5∘C . The heat of solution of NaCl is 3.76 kJ/mol. What is the mass (in g) of water in the Styrofoam cup?

    asked by Kelly
  61. statistics

    help i do not understand how to solve this question: assume that blood pressure readings are normally distributed with a mean of 111 and standard deviation of 7. A researcher wishes to select people for a study but wants to exclude the top and bottom 10

    asked by jessica
  62. math

    Bladder infections are often caused when the bacteria E. coli reach the human bladder. Suppose that 3000 of the bacteria are present at time t = 0. Then t minutes later, the number of bacteria present will be a) How many bacteria will be present after 10

    asked by Emmanuel
  63. chemistry

    2. When preparing a NaOH solution, a student did not allow the NaOH pellets to completely dissolve before standardizing the solution with KHP. However, by the time the student refilled the buret with NaOH to titrate the acetic acid, the remaining NaOH

    asked by anonymous
  64. social studies

    In harvesting sources, an excellent way both to narrow down a topic and discover a likely working thesis is to explore _______ the topic. A. different attitudes about B. radical ideas about C. classic literature on D. different perspectives on My answer is

    asked by phia
  65. chemistry

    Calculate the resulting pressure if 4.50 liters of nitrogen at 35 degrees Celsius and 790 torr and 3.7 liters of oxygen at 15 degrees Celsius and 750 torr are pumped into a 1.00 liters container at 25 degrees celsius. Assume ideal gas behavior.

    asked by carolann
  66. Chemistry: Check my answers?

    Write “yes” or “no” below if the chemical equation is balanced or not. 1. 2H2 + O2 ---> 2H2O 2. S8 + 12O2 ---> 8SO3 3. HgO ---> Hg + O2 4. Zn + HCl ---> ZnCl2 + H2 5. 2Na + 2H2O ---> 2NaOH + H2 6. 2Al + 3FeO ---> Al2O3 + 3Fe 7. 4Si2H3 + 11O2 --->

    asked by Anonymous
  67. science

    mountains that are formed between two large faults are known as a. seamounts b. uplifted mountains c. plateaus d. fault-block mountains

    asked by Anonymous
  68. algebra

    find a polynomial f(x) of degree 4 that has the following zeros: 0,7,-4,5 Leave your answer in factored form

    asked by Adnan
  69. Algebra

    What is a quartic function with only the two real zeros given? x = -4 and x = -1 A. y = x^4 + 5x^3 + 5x^2 + 5x + 4 B. y = x^4 - 5x^3 - 5x^2 - 5x - 4 C. y = -x^4 + 5x^3 + 5x^2 + 5x + 4 D. y = x^4 + 5x^3 + 5x^2 + 5x - 5

    asked by Jacob
  70. MATH

    there are 400 students at smith Elementary school 1/4 of the students are in fourth and fifth grade, 1/10 of the students are in grade 3, 2/8 are in second grade and 2/5 are in first grade . How many kids are in each grade? (4th and 5th have an equal

    asked by MANISH
  71. Health

    A swimmer would like to improve his time in the 100 yard freestyle race. After talking to his coach, he intends to focus on one critical element at the beginning of the race. This swimmer will try to improve his 100 yard freestyle time by improving his (1

    asked by Gabby
  72. Home Economics

    1. How can disposal of fullness be done on the sleeve head?

    asked by Isabella
  73. Physics

    A 5.1- kg concrete block rests on a level table. A 3.4- kg mass is attached to the block by a string passing over a light, frictionless pulley. If the acceleration of the block is measured to be 1.3 m/s2, what is the coefficient of friction between the

    asked by Alex
  74. chemistry

    Distilled water normally contains dissolved CO2. When preparing NaOH standard solutions, it is important to use CO2 free distilled water. How does dissolved CO2 in distilled water affect the accuracy of the determination of a NaOH solution’s

    asked by anonymous
  75. physics

    Two pucks collide on an air hockey table. Puck A has a mass of 17.0 g and is initially traveling in the +x direction at 7.00 m/s. Puck B has a mass of 51.0 g and is initially at rest. After the pucks collide, puck A moves away at an angle of 52.0 deg above

    asked by Tsion
  76. social studies

    The most important test of a paraphrase is A. how well it captures the essence of the original source using your own words. B. the number of synonyms found in the paraphrase. C. the extent to which your words parallel the words in the original source. D.

    asked by phia
  77. math

    The deck in Hope's backyard is round. It has 5 posts evenly spaced around the edge to support a trellis. For her birthday party, she wants to connect each post to all the other posts with crepe-paper streamers. How many streamers will she report?

    asked by Maya
  78. Physics

    A 115.0 kg box is pushed by a horizontal force F at constant speed up a frictionless ramp which makes an angle of 46.0 deg with the horizontal.what is the magnitude of the normal force between the ramp and the box? The applied force= 1167.04N

    asked by Anonymous
  79. university of png

    A car decelerates at -3.8m/second square without skidding when coming to a rest on a level road.what would its deceleration be if the road is inclined at 9.3degrees and the car moves uphill?(assume the same static friction coefficient and the car is on the

    asked by philando
  80. Economics

    Suppose Bill is on a low-carbohydrate diet. He can eat only three foods: Rice Krispies, cottage cheese, and popcorn. The marginal utilities for each food are tabulated below. Bill is allowed only 167 grams of carbohydrates daily. Rice Krispies, cottage

    asked by Mark
  81. math

    Five friends each ate 2/12 of a pizza .What fraction of the pizza Is left?

    asked by kevin
  82. Help Please Statistic

    7. The table below shows the probability distribution of the types of food purchased by students from the school cafeteria. What is the probability a student has purchased Caesar salad? (2 points) 0.17 Suppose houses are available for purchase during

    asked by Tikima
  83. Chemistry

    How many moles of hydrochloric acid are required to react with 2.57 moles of calcium hydroxide in a neutralization reaction?

    asked by Anonymous
  84. Trig - sum and difference formulas

    Write the expression as a single trigonometric functions: cos 6x cosx - sin6x sin x if you could do it step by step? also... How do I prove that sin(90deg + theta) = cos(theta)?? also step by step so i may learn?

    asked by Anonymous
  85. College Physics

    A doubly charged ion is accelerated to an energy of 33.0 keV by the electric field between two parallel conducting plates separated by 1.70 cm. What is the electric field strength between the plates?

    asked by Bill
  86. Math-Statistics

    Assume you build a Candy castle for which you buy a bag of gummy bears, a block of chocolate and a bag of nuts. The weight of the three ingredients is a random variable (X1, X2 and X3) with mean weights μ1 = 200 gram, μ2 = 400 gram and μ3 = 150 gram.

    asked by Niccoli
  87. PRE-CALC

    A biased coin has a 0.4 probability of landing on tails. The random variable X, based on a single toss of the coin, is defined as follows: X = 0 if heads appears; X = 1 if tails appears. What is the mean value of X? A) 0.7 B) 0.5 C) 0.4 D) 0.3 E) 0.6

    asked by Anonymous
  88. physics

    Consider a toy car that you pullback to make it go forward. Is it a force multiplier or a distance multiplier? Defend your answer with the observations you could make

    asked by marcus
  89. Chemistry

    3.25g of zinc was added to 50cm^3 of a 4.0 molar dm^-3 HCl. When the reaction was completed the temperature rose by 28 degrees celcius. (a) Is the reaction exothermic or endothermic? (b)All the zinc dissolve in this reaction. How many moles of zinc

    asked by Jessica
  90. science question?

    can someone explain to me?? can someone explain the economic impact of wind energy on an area

    asked by matt
  91. American History

    I'm preparing for my oral report for my NHD Project which is based on the creation of the nazi party but I can't answer one question which is, what is the theme that the nazi party learned or what was the theme of world war 2? Please help me THANK YOU :)

    asked by Tris
  92. Physics

    A wagon is coasting at a speed vA along a straight and level road. When twenty-five percent of the wagon's mass is thrown off the wagon, parallel to the ground and in the forward direction, the wagon is brought to a halt. If the direction in which this

    asked by Anonymous
  93. Math

    Mohammed had ducks and cows on his farm. These 14 animals had a total of 40 legs. How many each animals did Mohamed have?

    asked by Christine
  94. stats

    Five percent of all items sold by a mail-order company are returned by customers for a refund. Find the probability that, of two items sold during a given hour by this company, neither will be returned for a refund.

    asked by Anonymous
  95. Physics

    A box of mass 54.0 kg is sitting on a ramp which makes an angle of 37.0 degrees with respect to the horizontal. The coefficient of friction between the box and the ramp is 0.21. This box is connected by a massless string over a pulley at the top of the

    asked by Anonymous
  96. Macroeconomics

    A key determinant of the price elasticity of supply is

    asked by Anonymous
  97. History 8th

    Washington’s troops, joined by the French forces under de Grasse and Lafayette, soundly defeated the British troops of General Cornwallis at the which battle?

    asked by imissbobby♥
  98. Algebra 1 Answer Evaluation

    Factor. 1. 30y^3 - 50y A: 10y(3y - 5y) 2. Factor a^2 - 5a^2 + 2a -10 by grouping. A: ?

    asked by Anonymous
  99. physics

    A 41.0-kg body is moving in the direction of the positive x axis with a speed of 306 m/s when, owing to an internal explosion, it breaks into three pieces. One part, whose mass is 8.0 kg, moves away from the point of explosion with a speed of 326 m/s along

    asked by Tsion
  100. math

    mr andropolis wants to leave the waitress a 12% tip. estimate the tip he should leave if the family's bill is $32.46

    asked by Anonymous
  101. help

    Sara runs several times a week and always keeps track of how much time she runs each time she goes out. One day she forgets to take her stopwatch with her and wonders if she can still have some idea of her running time. As she passes a particular pond, she

    asked by Anonymous
  102. Science

    Which statement summarizes water quality issues in China

    asked by Katherine
  103. Physics

    Find the total change in the internal energy of a gas that is subjected to the following two-step process. In the first step the gas is made to go through isochoric heating until it gains 5363 J and its pressure is 2.92 105 Pa. In the second step it is

    asked by Mark
  104. Physics

    A wave can be propagated on a rope by holding one end of the rope and moving your hand up and down. The resulting wave is: A)neither transverse nor longitudinal. B)both transverse and longitudinal C)longitudinal D)transverse

    asked by Amanda
  105. World History

    Could someone explain how nationalism contributed to Napoleon's defeat?

    asked by Eli
  106. chemistry

    how much heat is required when 6.00g of water is melted at its melting point

    asked by chelsea
  107. math

    Enter only the value of the variable: 9(6-2v)=-12(v-11) i think its -13 is that correct ? if not what is it ?

    asked by josh
  108. math

    it took tracy 1 1/4 hours to finish her homework . how many seconds did it take trac to do her work?

    asked by kartik
  109. English

    1. All of them are useful. 2. All of them is useful. 3. All is expensive. 4. All are expensive. 5. All is silent in the room. 6. All are silent in the room. --------------------------- Which ones are grammatical?

    asked by rfvv
  110. Math

    An astronomical researcher is using software to study the parabolic path of an asteroid. By entering the equation for the path of the asteroid, the researcher could determine if the asteroid would collide with any other bodies in the near future. The

    asked by Anonymous
  111. Biology

    How does diving bradycardia reflex help explain why we can survive after falling into cold water and being submerged for long periods of time? Give a physiological reason that explains the relationship between lung size and body size. From a physiological

    asked by Aria
  112. Physics

    Two boxes of mass 7.40 and 7.00 kg are in contact and are accelerated across a horizontal surface by an force of 51.49 N applied parallel to the surface and pushing on the lighter box. The magnitude of the frictional force between the surface and the

    asked by Anonymous
  113. Physics

    A box of mass 50.0 kg is connected to a second box with a mass of 54.0 kg. Both are sitting on a horizontal surface and the coefficient of kinetic friction between the surface and each box is 0.51. If the second box is pulled away from the first box with a

    asked by Anonymous
  114. math

    Rachel spent 2 1/4 hours practing for her violin solo 5 times last week . How much times did Rachel spend practicing last week?

    asked by andrew
  115. Chemistry

    Your muscles are switched on by releasing calcium ion from the sarcoplasmic reticulum that surrounds your muscle bundles. The Ca2+ binds to a muscle fiber, and that triggers the contraction. To relax the muscle again, Ca2+ must be pumped out, so that the

    asked by Rini
  116. Geometry

    all square and all rectangles are equiangular?

    asked by Alisa
  117. physics

    A person has a choice while trying to move a crate across a horizontal pad of concrete: push it at a downward angle of 30 degrees, or pull it at an upward angle of 30 degrees. If the crate has a mass of 50.0 kg and the coefficient of friction between it

    asked by santoki
  118. Algebra!

    Can someone help me with these problems so i can do the rest of my textbook work on my own plz? What is the value of n so that the expression x^2+11x+n is a perfect square trinomial? (1 point) What is a solution of x^2+6x=-5? (1 point) What is the solution

    asked by Gabby
  119. Math-Statistics

    5) You know that you will inherit 20% of your uncle John’s wealth, 30% of your aunt Becky’s wealth and 50% of your parent’s wealth. Since they are not dead yet, their respective wealth is a RV and all we know is that their wealth at death is ~N and

    asked by Niccoli
  120. math

    The 6th grade classes have started a contest to collect cans for recycling. The first class to reach 500 cans will win. The chart below shows the two classes in the lead. How many cans does each class have left to meet their goal? show the work .

    asked by sai
  121. economics, math

    Could you please help me with this problem: Consider an oligopolistic market with two firms. Each of them produces using a cost function given by c(q)=q2. The aggregate demand in the market is given by 1000−p. Suppose that, in order to increase

    asked by Tia
  122. College Chem

    What is the maximum amount of barium sulfate that will dissolve in 600mL of 0.02M Na2SO4? Barium sulfate ksp=1.1*10^-10

    asked by shel
  123. Physics

    Suppose a sled has a mass of 12 kg and a child is exerting a force of magnitude 200 N. Find the angle q at which the normal force N vanishes. What is happening physically when N = 0?

    asked by Lauren
  124. homonyms

    What is the homonym for gnu???

    asked by dan!
  125. math

    Rosy has been jogging for 3 weeks. In the first week She jogged 3 days each for 4/6 of an hour. During week 2 she jogged for 3/4 of an hour on 2 days. In week 3 she jogged 4 days each for 3/5 of an hour . WRITE one expression that would show the total time

    asked by sid
  126. college chem 2

    Calculate the deltaS univ for the dissolving of NaCl at room temp. S' NaCl(s)=72.11 J/k*mol; S' NaCl(aq)=115.5 J/k*mol;deltaH' NaCl(s)=-411.12 kJ/mol; deltaH' NaCl(aq)=-407.27 kJ/mol.

    asked by shel
  127. math

    Jayden wants to be a fast runner like his big brother, Isaac. Isaac encourages Jayden to do a “30 for 30” challenge. This would require Jayden to spend 30 minutes outside every day for 30 days doing some type of physical activity. In return, Isaac

    asked by Bailey
  128. Math - PreCalc (12th Grade)

    Which rectangular equation corresponds to these parametric equations? x = 0.2sec t and y = -0.25tan t A) 25x^2 − 16y^2 = 1 B) 25x^2 + 16y^2 = 1 C) x^2 − 16y^2 = 25 D) 25y^2 − 16x^2 = 1 E) 4x^2 − 16x^2 = 1

    asked by Anonymous
  129. Physics

    A 2.00-kg object is hanging on a 1.1m string. The object is pulled 20cm away from the equilibrium position and held there. a) What is the pulling force in the string when the object is kept still ? b) Now the object is released, what is the speed of the

    asked by Physics: Pendulum
  130. man

    How to -2x+6y=-26 8x+6y=-1 6using elimination method

    asked by Ray
  131. Maths

    marie puts dimes in groups of 4 with 2 dimes left over. When she puts them in groups of 5, she had 1 left over? What is the smallest number of dimes she could have if she has more than 10?

    asked by Thess
  132. Math-Statistics

    Assume your expected lifetime income is $1.5 million and the standard deviation is $250,000. a) What is the chance that you will earn more than $1.1 million during your lifetime? b) What is the chance that you will earn less than $2 million during your

    asked by Brittany
  133. math

    The budget for the childrens museum's annual party is $20,000 . Food accounts for 1/2 of the budget , beverages accounts for 1/5 of the budget, decorations for 1/8 ,and entertainment for 1/8 of the budget . The rest of the money will be spent on staffing

    asked by kartik
  134. Physics

    Two blocks of weights 77.0 and 114.0 N are connected by as massless string and slide down an inclined plane making an angle of 45.0 deg. to the horizontal. The cofficient of kinetic friction between the lighter block and the plane is 0.15 and that between

    asked by Anonymous
  135. Physics

    A small block on a frictionless surface has a mass of 70 g. It is attached to a massless string passing through a hole in a horizontal surface (see diagram). The block is originally rotating in a circle of radius 45 cm with angular speed 0.80 rad/s. The

    asked by Luke
  136. math

    Anna uses 5/6 tank of gas each week driving to work . How many tanks of gas does Anna use in 1 2/3 months.

    asked by kenny
  137. Math

    Which expression is equivalent to sin(3x) + sin x? A) 2cos(2x)sin x B) 2sin(2x)sin x C) -2sin(2x)cos x D) 2sin(2x)cos x E) -2cos(2x)sin x

    asked by Anonymous
  138. Indian wells

    5/8 of the students in mr. Halls class got an A or B . Four times as many students got an A than a B. what fraction of Mr. Hall's class got an A.

    asked by Gina
  139. Math-Statistics

    The chance that a college student has a job offer before graduation is 70%. If I sample 200 graduates… (use continuity correction) a) what is the chance more than 130 of them have a job offer? b) what is the chance less than 133 of them have a job offer?

    asked by Niccoli
  140. Math

    Joenia has 12 kiloliters of Gatorade. How many ml of Gatorade does she have?

    asked by Shohanur
  141. English

    I have an essay and this is one part of my thesis... "In the nineteenth century, some ways the middle class participated in revolutions was by establishing liberalism, one way was through literature, and through the revolutions of 1848." I wasn't sure if

    asked by Serena
  142. math

    Judie weighed 7 3/8 pounds when she was born .By the age of 6 she was 5 times as heavy . if A stands for pounds Write the equation you would use to find Judie weight at age 6

    asked by anny
  143. PRE-CALC

    At how many points is this function discontinuous? f(x)=(2(x − 1)(x − 4))/((x + 2)(x − 5)) A) one B) two C) three D) four E) five

    asked by Anonymous
  144. Finance

    what is the net present value of a note for $70,000, PAID MONTHLY AT $600, plus 7% interest

    asked by Dave
  145. math

    1/2 as a decimal

    asked by Anonymous
  146. critical thinking

    is this a cliam or value judgemnt or ono-value judgement? 1. meat grilled over hickory coal tastes better than meat grilled over mesquite?

    asked by glenn cooper
  147. language

    What is the synonym for car?

    asked by Jiskha1
  148. Calculus A

    Find all relative extrema and points of inflection for the following function... h(X)= X^2+5X+4/ X-1 min= max= inflection points=

    asked by Anonymous
  149. Physics

    A 5-kg ball is at rest when it is struck head-on by a 2-kg ball moving along a track at 10 m/s. If the 2-kg ball is at rest after the collision, what is the speed of the 5-kg ball after the collision?

    asked by Amanda
  150. Water cycle question

    The planet is covered by 97% ocean water. What would the global water cycle look like if the earth were covered by 50% ocean water?

    asked by Anonymous
  151. math

    The 6th grade classes have started a contest to collect cans for recycling. The first class to reach 500 cans will win. The chart below shows the two classes in the lead. How many cans does each class have left to meet their goal? show the work . find how

    asked by raj
  152. Algebra

    Graph the rational function x/(x-6) To graph the function, draw the horizontal and vertical asymptotes (if any) and plot at least two points on each piece of the graph.

    asked by Kenny
  153. English

    What can you do to save electricity? 1. I can unplug my computer when I go to bed. 2. I can turn off the lights when I leave my room. 3. I can unplug all the things such as the computer, the printer, the speaker, etc. 4. I can unplug the electric mat when

    asked by rfvv
  154. phisecs

    .: A 5.0 kg block is moving with constant velocity down a rough incline plane. The coefficients of static and kinetic friction between the block and the incline are 0.25 and 0.20, respectively. What is the inclination angle of the incline plane?

    asked by w
  155. Geometry

    All square and all rectangles are equilateral?

    asked by Ariana
  156. Math

    What is the exact value of sin(2 theta) if cos theta= 3/5 and theta is in quadrant IV?

    asked by Anonymous
  157. math

    0.625 as a percent

    asked by Anonymous
  158. English

    Analogies How is migration like a vacation? I think migration is like a vacation because the animal knows it is time to go to a warmer place where food will be plentiful and weather will be warmer.

    asked by Sue
  159. Science

    Which element would be most reactive? a. Al b. Cl c. P d. Na I initially thought that the answer was B, but I'm not sure about it. My second question is... Which non-metal is most reactive? a. Cl b. F c. I d. S I'm not sure about the answer for this one

    asked by Alice
  160. literacy

    how do you write a news report on the topic "storm shuts down region"??

    asked by ann
  161. Geometry

    A fighter plane observes a target on the ground with an angle of depression of 21 degrees. The target is 3.5 miles away along a direct line of sight. How high is the fighter plane? Round to hundredths. Please help!

    asked by Kevin
  162. English

    1. I haven't read Harry Potter yet. 2. I don't read Harry Potter yet. 3. I didn't read Harry Potter yet. ------------------------------ Which expressions are not grammatical? Is #2 or #3 grammatical?

    asked by rfvv
  163. Algebra 1 Answer Evaluation

    Factor the following polynomial completely. "3c^2 + 12 - 63" My answer: (3x +9)(x - 7)

    asked by Anonymous
  164. Treaty of Paris, quick question, thanks! ☺

    The Treaty of Paris in part included returning to where exactly? I cannot remember and I am writing a paper for school in which I need to know where they went to. Thanks! ☺ ~katt

    asked by imissbobby♥
  165. math

    0.6 as a percent

    asked by Anonymous
  166. Math

    If your heart beats 24 beats inn10 sec,how many beats will it beat in 3 mins?

    asked by Deanna Dobson
  167. Geometry

    All rectangles are square?

    asked by Genny
  168. math

    0.7 as a fraction

    asked by Anonymous
  169. Calc Help :(((((

    find the derivative of: (1/3)^(x^2) i got ln(1/3)*(1/3)^(x^2)*(2x) but the answer is supposed to be the negative of that.. where does the negative come in?

    asked by Amanda
  170. 4th grade math

    What is 1. 2/3 + 3/6 = 2. 3 1/10 + 17/5 = 3. 3 2/6 - 1 5/6 =

    asked by Mythreyee
  171. Chemistry

    What is the molarity of a 5.00 x 102 ml solution containing 2490 g of KI? How many moles of LiF would be required to produce a 2.5 M solution with a volume of 10.5 L? How many grams of NaI would be used to produce a 2.0 M solution with a volume of 10.00 L?

    asked by Clea
  172. math

    If an airplane travels at 300 mph with no air resistance, and it travels directly south with a wind of 50 mph east, how fast is the plane going?

    asked by tarra
  173. math

    The decimal 4.25 is between which two integers? A. between -2 and +4 B. between -1 and +3 C. between -1 and +4 D. between -1 and +5

    asked by victoria
  174. Quadratic Equations

    Whats The Next Step To This: 2025a+45b=-1.39 324a+18b=1.81

    asked by Lanna
  175. homonyms

    What is the homonym for do?

    asked by jake
  176. Redox Titration questions!

    Calculate the percent of iron in a 50.0 gram sample containing iron if 45.6 mL of 2.5 M KMnO4 titrant was used. can you solve this?

    asked by Yoojin Lee
  177. Water cycle question

    Explain why residence time in the atmosphere for water is short but the flux in and out of the atmosphere is huge.

    asked by Anonymous
  178. Calculus

    Find dy/dx implicitly in terms of x and y only for the following function; x+ 4xy=y^2

    asked by Raven
  179. Calculus A

    Find all relative extrema and points of inflection for the function; h(x)=(x^2+5x+4)/(x-1)

    asked by MacDonald
  180. Home Economics

    1. Differentiate between techniques and processes. 2. Give two examples of each after differentiating.

    asked by Isabella
  181. Physics

    A series circuit contains only a resistor and an inductor. The voltage V of the generator is fixed. If R = 15 and L = 5.6 mH, find the frequency at which the current is one-half its value at zero frequency. ?? Hz Thanks!

    asked by Neil
  182. English

    Is the comma in the right place below? Did you know, Dad, that the the colonists broke all the treaties signed by Philip and his father? Do the commas go there because to set off a nonessential appositive?

    asked by Kelly
  183. grammar

    conjugate "They were students" in all form of tenses.

    asked by fathima
  184. 4th grade math

    Suppose 8 kids are running a mile. 3/4 of the kids ran the mile in less than 10 minutes. How many kids finished the mile in less than 10 minutes.

    asked by Mythreyee
  185. physics

    if you throw a 0.2 kg ball straight up at 8 m/s how high will it go

    asked by AMY
  186. Music

    So I can't follow links, but I am doing a slideshow about losing someone you care deeply about, (yes it is for school) and I am trying to find a certain song. It is country, I cannot remember the name of the song or the artist, but i know that it is two

    asked by imissbobby♥
  187. Lit

    I have an essay and this is one part of my thesis... "In the nineteenth century, some ways the middle class participated in revolutions was by establishing liberalism, one way was through literature, and through the revolutions of 1848." I wasn't sure if

    asked by Serena
  188. trig

    tan^2(5x)cos^4(5x) = 1/8 - 1/8cos(20x)

    asked by Peggy
  189. math

    CALCULATE if 1/3of the candles are pink 3/8 are yellow and 1/4 is blue remaining 2 are white

    asked by SAM
  190. math, economics

    Consider a market in which consumption of the good being traded generates a positive externality. There are 100 identical consumers, each with a utility function given by 1/2√q+m+√G, where G denotes the total level of consumption in the market. The

    asked by Nick
  191. math

    Thomas bought a 3-foot sandwich for his .Hew figured out that each guest can have 1 1/2 inches of the sandwich . HOW MANY guest does Thomas have.

    asked by rachel
  192. Puncuation

    Does this sentence require any improvements in terms of punctuation? I think Hansberry means that summer is honorable in terms that this season does fulfill wishes and dreams like she had been told; Hansberry’s wish being that the dying woman could live

    asked by Anonymous
  193. English

    What is the difference between lunch plate and lunch tray in shape? Do both mean the same?

    asked by rfvv
  194. econ

    economics- what is the law called where cost of input increases so cost of output must increase (in order to keep max profit)

    asked by sara
  195. geometry

    gerri raced around all the faces of a three-dimensional shape.she drew the following polygons.what three-dimensional was gerri tracing.

    asked by devon
  196. 6th gr. math

    0.2 as a percent?

    asked by Anonymous
  197. physics

    explain the input energy and out put energies of two kitchen machines

    asked by AMY
  198. Speech- Statistic needed

    Does anyone know of any websites that have statistics on the number of people that volunteer for disaster relief in the us?

    asked by Rebekah
  199. Implicity

    Find dy/dx implicitly in terms of x and y only for the following function; X+4xy=y^2

    asked by Anonymous
  200. English

    Need an example of an analogy that has to do with migration is like a vacation. Don't have any idea!!! I am lost on this one Maybe "Vacation is like a migration to a tropical island"

    asked by Anonymous
  201. math

    Rachel , smith , john and Thomas brought in 300 pennies for the penny harvest . Smith brought in 2/6 of the pennies . Rachel brought 1/5 and Thomas brought 1/4 of the pennies. How many pennies did john bring in?

    asked by rose
  202. math

    There are 3 earthworms .Their length are 6 1/4 inches, 4 1/4 inches and 5 3/8 inches. What is the total length of the three earthworms.

    asked by kevin
  203. mathematics

    66+77=143

    asked by joy lim
  204. math

    Thomas bought a 3-foot sandwich for his .Hew figured out that each guest can have 1 1/2 inches of the sandwich . HOW MANY guest does Thomas have.

    asked by georgy
  205. bussines

    does it take longer to get your mba if you take bcom over bba?

    asked by celina
  206. math

    kevin bought a 3-foot sandwich for his .Hew figured out that each guest can have 1 1/2 inches of the sandwich . HOW MANY guest does kevin have

    asked by john
  207. math

    0.125 as a percentage?

    asked by Anonymous
  208. math

    0.25 as a fraction

    asked by Anonymous
  209. math

    0.6 as a fraction

    asked by Anonymous
  210. math

    1/20 as a fraction?

    asked by Anonymous
  211. math

    2/5 as a decimal

    asked by Anonymous
  212. math

    3/4 as decimal

    asked by Anonymous
  213. trig

    tan^2(5x)cos^4(tx = 1/8 - 1/8cos(20x)

    asked by Peggy