Questions Asked on
November 8, 2012

  1. Math for Steve or someone good at math

    1. Find the percent of change when the price of a radio changes from $40.00 to $44.00. a. 12% b. 10% c. 36.4% d. 40% 2. Find the percent of change when the price of an oven changes from $450 to $396. a. 15% b. 14% c. 13% d. 12% 3. The top player’s

    asked by Jman
  2. Physics

    A boat crosses a river of width 122 m in which the current has a uniform speed of 2.39 m/s. The pilot maintains a bearing (i.e., the direction in which the boat points) perpendicular to the river and a throttle setting to give a constant speed of 2.81 m/s

    asked by Greg Knightly
  3. math Ms. Sue

    A right triangle has an area of 13 m2. The dimensions of the triangle are increased by a scale factor of 3. What is the area of the new triangle? 39 m2 169 m2 117 m2 142 m2 I think it is A...?

    asked by Deborah
  4. Math

    Two cards are selected at random without replacement from a well-shuffled deck of 52 playing cards. Find the probability of the given event. A pair is not drawn.

    asked by Sam
  5. Math

    Eric eats 1/6 of an apple pie and Jack eats 1/4 of the apple pie. How much of the pie has been eaten?

    asked by Bell
  6. Chemistry

    Consider the reaction 2H2O(g) --> 2H2(g) + O2(g) deltaH = +483.6 kJ/mol at a certain temperature. If the increase in volume is 32.7 L against an external pressure of 1.00 atm, calculate deltaU for the reaction. (1 L * atm = 101.3 J)

    asked by Kim
  7. Chemistry

    Methanol is an organic solvent and is also used as fuel in some automobile engines. From the following data, calculate the standard enthalpy of formation of methanol. 2CH3OH + 3O2 --> 2CO2 + 4H2O, (delta H = -1452.8 kJ/mol

    asked by Gabby
  8. Chemistry

    For which of the following aqueous salts will electrolysis produce hydrogen gas and oxygen gas? Answered the hint in Mastering Chem & looked over the book and I still have no idea. Check all that apply: A) NiF_2(aq) B) NaF(aq) C) NiI_2(aq) D) NaI(aq) E)

    asked by Mike
  9. Math

    Mr. Smith is purchasing a $190000 house. The down payment is 20% of the price of the house. He is given the choice of two mortgages: (A) a 25-year mortgage at a rate of 8%. Find: (i) The monthly payment: $ (ii) The total amount of interest paid: $ (B) a

    asked by Amber
  10. Math

    To make a sandwich, Steve uses 1/8 lb of ham and 1/5 lb of cheese. How much more cheese than ham does he use?

    asked by Bell
  11. Math

    If Joyce reads 1/6 of her book on Monday, 2 over 5 of her book on Tuesday, and 1/3 of her book on Wednesday, what part of her book does she read?

    asked by Bell
  12. Math

    If Nell works 3/4 of an hour on Monday and 6/10 of an hour on Tuesday, how much time will she work altogether?

    asked by Bell
  13. Chemistry

    The flame in a torch used to cut metal is produced by burning acetylene(C2H2) in pure oxygen. Assuming the combustion of 1 mole of acetylene releases 1251kj of heat, what mass of acetylene is needed to cut through a piece of steel if the process requires

    asked by Brittany
  14. PHYSICS PLEASE HELP

    Suppose a distant world with surface gravity of 7.12 m/s2 has an atmospheric pressure of 7.48 104 Pa at the surface. (a) What force is exerted by the atmosphere on a disk-shaped region 2.00 m in radius at the surface of a methane ocean?____________N (b)

    asked by AMY
  15. chem

    You have a large amount of 7.50M stock solution. You need 1.80L of 3.00M solution for an experiment. How would you prepare the desired solution without wasting any stock solution?

    asked by chemdummy
  16. Chemistry

    Please write the balanced chemical equation for reaction the following chemical reaction ozone gas, O3, reacts with 3,3,4,4,5,5-hexanmethyl-1-hexyne, H-C≡C-C(CH3)2-C(CH3)2-C(CH3)2-CH3 to produce carbon dioxide gas, CO2 , and water gas, H2O When balancing

    asked by Amanda
  17. math

    a fifth grade class sold 25 liters of orange juice the orange juice was sold in cups containing 200 millilters and 300 milliliters an equal number of cups contaning 200 milliliters and 300 millilters were sold how many cups of orange juice did the class

    asked by Anonymous
  18. Organic Chemistry

    Why does crotyl chloride react faster than 1-chlorobutane in ethanol, since both are primary alkyl halides?

    asked by Jack
  19. math

    beth and lewis buy the same amount of fish pellets if beth feeds her fish 14 pellets each day a conntainer of pellets will last 20 days if lewis feeds his fish 8 pellets each days how many days will the container of pellets last lewis

    asked by Anonymous
  20. Physical Science

    Compute the wavelength in air of ultrasound with a frequency of 50 kHz if the speed of sound is 344 m/s.

    asked by Allison
  21. Math

    Yolanda completed 14/25 of her math problems before her break and 1/5 of her math problems after her break. What fraction of her math problems did she complete?

    asked by Bell
  22. physics

    An object moves along a circular path with a constant speed, |⃗vo|. (Semi Circle with point A on one side point B on the other. Looks like a 90 degree angle with points A and B on either side of the hypotenuse.) The average acceleration in going from A

    asked by Jess
  23. math

    There are 16 people at a party. They want to set up relay teams with exactly 3 people each. Can they do it? Explain.

    asked by Phyllis
  24. English 4

    Write a brief response to Polonius's statement "And thus do we of wisdom and of reach... By indirections find directions out." What do you think of his method of finding out the truth about his son?

    asked by Monica
  25. physics

    A bat flying in a cave emits a sound and receives its echo 0.1 s later. Show that the distance to the wall of the cave is 17 m.

    asked by Scott m
  26. Physics

    If a 0.147 kg baseball has a momentum of p = 4.32 kg·m/s as it is thrown from home to second base, what is its velocity? _______ m/s toward second base

    asked by Dakota
  27. Maths

    Find domain and range of 11-7 sin x

    asked by Vaibhav nigam
  28. chem

    An 80 proof brandy is 40.0% (v/v) ethyl alcohol. The "proof" is twice the percent concentration of alcohol in the beverage.How many milliliters of alcohol are present in 700mL of brandy?

    asked by tracy
  29. chem

    Calculate the final concentration of a. 4.0 L of a 4.0 M HNO3 solution is added to water so that the final volume is 8.0L b. Water is added to 0.35L of a 6.0M KOH solution to make 2.0L of a diluted KOH solution. c.A 20.0 mL sample of 8.0% (m/v)NaOH is

    asked by tracy
  30. langrange

    Should elementary school children receive material rewards for performance and cooperation? Imagine that you are a parent and that you have a child in the first grade. You have received a notice from the principal of the school that a program of tangible

    asked by Anonymous
  31. math

    In the election 46% of the class voted for Celina. If there are 50 members in the class, how many votes did Celina receive?

    asked by JJ
  32. Physics

    The ends of a light string are tied to two hooks A and B in a ceiling which are 100 cm apart horizontally so that the length between hooks is 140 cm. A 650g mass is then attached by a second length of string to a point C on the first, 80 cm from A, and

    asked by Tiffany
  33. English(check my answer please(:)

    1. Which of the following events caused immigrants to migrate north after the civil war? -the passage of the homestead act****** -the emergence of industry in cities -advances in the printing industry - the completion of the transcontinental railroad 2.

    asked by Jessica
  34. Physics

    While following the directions on a treasure map, a pirate walks 36.6 m north, then turns and walks 6.3 m east. A.) What is the magnitude of the single straight-line displacement that the pirate could have taken to reach the treasure? Answer in units of m.

    asked by Luke
  35. Math

    What is the first thing you need to do to add 1/9 + 5/6 ?

    asked by Bell
  36. Physics

    The distance between Earth and the Moon is 3.84 * 108 m. Show that the round-trip time for the light is 2.56 s Thanks in advance

    asked by Shawn=Help please
  37. pattern help please??

    write the next three terms and write a rule to describe the number pattern. .57, 0.66, 0.75, .084, ...

    asked by Carrie
  38. physics

    A ski jumper starts from rest 44.0 m above the ground on a frictionless track, and flies off the track at an angle of 45.0° above the horizontal and at a height of 14.0 m from the ground. Neglect air resistance. (a) What is his speed when he leaves the

    asked by physics help!!
  39. physics

    The planetMars requires 2.35 years to orbit the sun, which has a mass of 2 × 1030 kg, in an almost circular trajectory. Find the radius of the orbit of Mars as it circles the sun. The gravitational constant is 6.672 × 10−11 N · m2/kg2 . Answer in

    asked by Alyssa
  40. Chemistry

    A small crack is present in the rubber stopper. How does this affect the calculated molar volume of the CO2? *experiment deals with carbonate analysis;molar volume of carbon dioxide

    asked by Anonymous
  41. Math

    Missy divided her scrapbook page into sections to be decorated Each section she decorated was either 1/6 or 1/2 of the page The shaded parts of the figure show the sections Missy decorated Which of the following equations represents the total fraction of

    asked by Jerald
  42. Business Calc

    Determine when, to the nearest year, $3,000 invested at 5% per year, compounded daily, will be worth $10,000.

    asked by Jamie
  43. Physics

    A rotating uniform-density disk of radius 0.7 m is mounted in the vertical plane. The axle is held up by supports that are not shown, and the disk is free to rotate on the nearly frictionless axle. The disk has mass 5 kg. A lump of clay with mass 0.3 kg

    asked by Udit
  44. Math

    The girls' high school basketball team played 12 games. They won 6 more games than they lost. Find the number of games the basketball team won.

    asked by Ali
  45. Chemistry

    Pentane is a small liquid hydrocarbon, between propane and gasoline in size C5H12. The density of pentane is 0.626g/ml and its enthalpy of combustion is ΔHcomb =-3535kj/mol. Estimate the fuel valve and the fuel density of pentane.

    asked by Brittany
  46. Math

    A 1.00kg piece of aluminum at 90.0c in placed in 4.00 liters (4.00kg) of water at 25.0c. What is the final temperature(Tf)

    asked by Dave
  47. chemistry

    I need help with this lab. Write the equation for the decomposition of the hydrate, CuSO4*XH2O. Mass of crucible and hydrate: 93.000g Mass of crucible and pure salt: 91.196g I need to calculate the following: 1. mass of water in hydrate sample(g) 2. number

    asked by Nancy
  48. PHYSICS

    A large balloon of mass 237 kg is filled with helium gas until its volume is 318 m3. Assume the density of air is 1.29 kg/m3 and the density of helium is 0.179 kg/m3. (b) Calculate the buoyant force acting on the balloon. ________N (c) Find the net force

    asked by Amy
  49. Chemistry

    An element has a body centred cubic structure with edge cell of 288 pm .The density of the element is 7.2 g/cm3.How many atoms are present in 208g of the element.

    asked by Raynold
  50. Physics

    Suppose the surface (radius = r) of the space station in the figure is rotating at 38.6 m/s. What must be the value of r for the astronauts to weigh one-half of their earth-weight?

    asked by Donald
  51. 7th grade social studies help please

    The twentieth century–and the 1960s in particular–saw a proliferation of independence movements among former European colonies in Africa and Asia. Why do you think countries wanted independence? In what ways did these countries' struggles for

    asked by Delilah
  52. chemistry

    the specific heat capacity of iron metal is 0.450 j/gk. how many joules of energy are needed to warm 1.31 g of iron from 20.00 C to 29.00 C?

    asked by Maria
  53. College Math

    i'm having trouble calculating this. can someone help please? A $7,000, 4%, 120-day note, dated March 20, is discounted on July 15. Assuming a 3% discount rate, the bank discount is: a) $1.74 b) $1.77 c) $7.11 d) $17.68 e) None of these .

    asked by Lisa
  54. physics

    A 0.72 kg rock is projected from the edge of the top of a building with an initial velocity of 11 m/s at an angle 51◦ above the horizontal. Due to gravity, the rock strikes the ground at a horizontal distance of 17.4 m from the base of the building. how

    asked by cristie
  55. history

    Supreme Court's decision in Brown v. Board of Education of Topeka?

    asked by Anonymous
  56. PHYSICS PLEASE HELP

    A large balloon of mass 237 kg is filled with helium gas until its volume is 318 m3. Assume the density of air is 1.29 kg/m3 and the density of helium is 0.179 kg/m3. (b) Calculate the buoyant force acting on the balloon. ____________N (c) Find the net

    asked by AMY
  57. geography

    Central asia Complete the following: Describe what influence the former invaders of this region brought into the regions culture. a. Turkic b. Arabs c. Mongols under Genghis Khan D. Mongols under Timur e. Russians f. Soviet

    asked by tony
  58. PHYSICS

    Suppose a distant world with surface gravity of 7.12 m/s2 has an atmospheric pressure of 7.48 104 Pa at the surface. (a) What force is exerted by the atmosphere on a disk-shaped region 2.00 m in radius at the surface of a methane ocean? ________N (b) What

    asked by Amy
  59. Math

    Tanya is baking a birthday cake for her mom. The recipe calls for 3/8 stick of butter for the cake and another 1/4 stick of butter for the frosting. Which stick of butter below is right to show the total amount of butter Tanya needs for her cake and

    asked by Jerald
  60. Math

    Everett is reading a book for his language arts class. He read 1/3 of the book on Saturday, 3/8 of the book on Sunday and 1/4 of the book on Monday. Which procedure can Everett use to find the total fraction of the book he has read? A.Write the equivalent

    asked by Jerald
  61. Math- Calculus

    Locate the absolute extrema of the function on the closed interval: y= 4/x+tan(pix/8), [1,2]

    asked by Olivia
  62. Math

    Shelly and Marcom are selling popcorn for their music club. Each of them received a case of popcorn to sell. Shelly has sold 7/8 of her case and Marcon has sold 5/6 of his case. Which of the following explains how to find the portion of popcorn they have

    asked by Jerald
  63. physical

    to strengthen his arm and chest muscles, an 82-kg athlete who is 2.0 m tall is doing push ups. his center of mass is 1.15 m from the bottom of his feet, and the centers of his palms are 30.0cm from the top of his head. find the force that the floor exerts

    asked by Dan
  64. Physics

    The Earth has an angular speed of 7.272·10-5 rad/s in its rotation. Find the new angular speed if an asteroid (m = 3.45·1022 kg) hits the Earth while traveling at a speed of 4.41·103 m/s (assume the asteroid is a point mass compared to the radius of the

    asked by Joe Frank
  65. Physics

    You are the technical consultant for an action-adventure film in which a stunt calls for the hero to drop off a 25.1-m tall building and land on the ground safely at a final vertical speed of 3.81 m/s. At the edge of the building's roof, there is a 103-kg

    asked by Joe Frank
  66. chem

    calculate the delta H for 3 Fe(s) + 4 CO2(g) ¨ 4 CO(g) + Fe3O4(s)

    asked by Samantha
  67. Physics 3A

    Determine the magnitude of the effective value of at a latitude of 60 on the Earth. Assume the Earth is a rotating sphere.

    asked by Anonymous
  68. math

    Jenna has $1500 in a savings account. She adds $30 to her account each month. Luis has $2400 in his savings account. He withdraws $30 from his account each month. Write and solve a system of equation.

    asked by sahar
  69. Statistics

    New York and Pennsylvania have progressive toll roads. Upon entering the toll road the driver receives a ticket marking the location and time of entrance. Upon exiting the mileage is computed and the driver pays the toll. Which of the following would you

    asked by John
  70. math

    What is the percent by mass of hydrogen in C3H8? A. 8.0% B. 18.2% C. 80.0% D. 81.8% I say B

    asked by shana
  71. Economics

    If an economy produces its most wanted goods but uses outdated production methods, it is --the answer is "it is not achieving productive efficiency. But doesn't productive efficiency mean using the "least cost method of production"? So if you use outdated

    asked by Lily
  72. Chemistry

    for a question it is given that there is 14.6 g of calcium chloride in 246 g of water. Kf is 1.86 C/m we need to find the freezing point of this solution. when i do the calculations, i get the freezing point to be -0.99 (without using the vant hoff factor

    asked by Ania
  73. physics

    calculate the electric flux through the curved surface and base of a right hollow cone of height h and base radius r if a charge q is placed at its vertex?

    asked by devender
  74. Science

    An echo is heard from a building 6 s after you blow the cars horn. How far away is the building?

    asked by Molly J
  75. physics

    A 74.0 kg ice skater moving to the right with a velocity of 2.58 m/s throws a 0.18 kg snowball to the right with a velocity of 24.4 m/s relative to the ground. (a) What is the velocity of the ice skater after throwing the snowball? Disregard the friction

    asked by Brandon
  76. math

    rene gave each of six people 1/10 of a veggie pizza. rene has 2/5 of the pizza left. explain how this is true

    asked by joe
  77. Physics

    **I JUST NEED THE STEPS ON HOW TO SOLVE THE PROBLEMS** An object experiences an acceleration of 6.8m/s^2. As a result, it accelerates from rest to 24m/s. How much distance did it travel during that acceleration? A car which is traveling at a velocity of

    asked by Elyssa
  78. physics

    A 853-kg car stopped at an intersection is rear-ended by a 1450-kg truck moving with a speed of 16.0 m/s. If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find the final speed of both vehicles after the

    asked by ashlon
  79. physics

    Two carts with masses of 4.00 kg and 3.40 kg move toward each other on a frictionless track with speeds of 4.70 m/s and 3.56 m/s respectively. The carts stick together after colliding head-on. Find the final speed.

    asked by Brandon
  80. Math

    John ate some pie for lunch. He left 2/3 of the pie. Jerry ate 1/2 of the remaining pie. How much pie did Jerry eat?

    asked by Nina
  81. math

    Find the relative extrema, if any, of the function. Use the second derivative test, if applicable. g(x)=4x^2+7x+6 relative maximum (x, y) = (, ) relative minimum (x, y) = (, )

    asked by Britney
  82. physics

    Consider a pulse of laser light aimed at the Moon that bounces back to Earth. The distance between Earth and the Moon is 3.84 * 108 m. Show that the round-trip time for the light is 2.56 s.

    asked by Jamie P
  83. math

    3/7 of the muffins in the bakery were carrot muffins. The number of blueberry muffins was twice the number of multi grain muffins. The number of multi-grain muffings was 1/3 the number of banana muffins. If there were 108 multi0grain muffins, how many

    asked by Anonymous
  84. math

    2. Tammy Monahan is considering the purchase of a home entertainment center. The product attributes she plans to consider and the weights she gives to them are as follows: Portability .1 Sound projection .6 Warranty .3 Tammy related the brands as follows:

    asked by scor
  85. chemistry

    A 0.2053g sample of an organic acid requires by titration, 15.0 mL of 0.1008 M sodium hydroxide for complete neutralization. i)what the molar mass of the acid if it is monoprotic? ii)if the acid is composed of 5.89% H,70.6% C, and 23.5% O by mass, what is

    asked by sharul
  86. Physics

    As a swimmer pulls his arm through the water, various muscles exert forces on the upper arm. The figure below shows a force F exerted on the humerus (upper arm bone) by the pectoral muscle. The muscle is connected to the bone d = 7.00 cm from the center

    asked by Pat
  87. Geometry

    Given: Segment CE bisects

    asked by Kara
  88. math

    the disney golf classic starts with 64 golfers.the golfers form pairs and each pair plays a match.the losers drop out and the winners of each pair then form new pairs and play again.then those winners form pairs and play.this continues until one wins.

    asked by quan tanksley
  89. math

    What is one mole of H2O composed of? A. 2 hydrogen atoms and 1 oxygen atom B. 2 × (6.02 × 1023) hydrogen atoms and 6.02 ×1023 oxygen atoms C. 3 atoms of water and 2 oxygen molecules D. one half of a molecule of peroxide I say A

    asked by shana
  90. chemistry

    What does 0.540g of bromine and 0.858g of iodine yield

    asked by elayna
  91. math

    Determine where the function is concave upward and where it is concave downward. Concave upward: A. (-/infty,0) B.(-1,1) C.(0, infinity) D. (- infinity,infinity) E. (no interval) Concave downward: A.(-/infty,0) B.(-1,1) C.(0, infinity) D.(-

    asked by Renee
  92. Calculus

    The volume of an ice cube as it melts is given by the equation: V = 2.1x10^-5 t^3 - 6.5x10^-4 t^2 - 0.346 t + 21.31 Determine the rate at which the sides of the ice cube melt at both 10 and 75 minutes after the beginning of the melting process. You may

    asked by Anonymous
  93. Physics

    Each of the space shuttle's main engines is fed liquid hydrogen by a high-pressure pump. Turbine blades inside the pump rotate at 595 rev/s. A point on one of the blades traces out a circle with a radius of 0.02 m as the blade rotates. (a) What is the

    asked by Donald
  94. pschology

    You have received a notice from the principal of the school that a program of tangible rewards (buttons, stickers, starts, bags of popcorn, cookies) is being considered. The notice compares tangible rewards of the children with the pay adults get for work.

    asked by Anonymous
  95. science grade 7

    Because pressure sensors are found deep in the dermis, they are not able to feel the difference between a little pressure and a lot of pressure. False?

    asked by rawr... im a dinosaur.... rawr
  96. math

    write an exponents using single exponents of x^2 y . xy^2

    asked by marcel
  97. chemistry

    an unknown element crystallizes in a face-centered cubic unit cell. with an edge length of 392.4 pm. The solid has a density of 21.09 g/cm^3. what is atomic weight of solid? so what i did was : FC cubic uit --> 4 atoms edge length--> l = 2*root2*r = 392.4

    asked by Ania
  98. Social studies

    Does Inca, Maya, or Aztecs have no central government?

    asked by Bob
  99. maths

    A metal pipe is 63cm long. Inner diameter of a cross section is 6m and the outer diameter is 8cm find:-surface area of the base a , surface area of the base b , the outer curved surface area inner curved surface area total surface area

    asked by chaithu
  100. Physics electric force, please help!

    A charge of +Q and a charge of +2Q are separated by a distance r. The electric force of +2Q on +Q has a magnitude of F and is directed to the right. Which one of the following statements is correct regarding the electric force of +Q on +2Q? (A)The electric

    asked by Matt
  101. trig

    the pendulum of a grandfather clock is 1.3m long. Determine the length of the arc through which the pendulum moves if it moves through an angle of 15

    asked by aj
  102. Business Math Question

    You borrow $2,600 and repay the loan in 12 monthly installments of $232. What was the finance charge per $100 of the amount financed?

    asked by Will
  103. English

    2. The speaker in the poem, “Mother To Son,” says the following: “Life for me ain’t been no crystal stair.” This is an example of which literary element? (1 point) rhyme* simile metaphor alliteration i say a could sombody check and see if this is

    asked by aliyah
  104. Physics

    The pilot of an aircraft wishes to fly due west in a 52.6 km/h wind blowing toward the south. The speed of the aircraft in the absence of a wind is 154 km/h. A.) How many degrees from west should the aircraft head? Let clockwise be positive. Answer in

    asked by Sam
  105. Physics 12

    A large fake cookie sliding on a horizontal surface is attached to one end of a horizontal spring with spring constant k = 375 N/m; the other end of the spring is fixed in place. The cookie has a kinetic energy of 20.0 J as it passes through the position

    asked by rafeh
  106. chem

    How many milliliters of 4.80 M HCl are required to react with 110 mL of 1.48 M Al(OH)3? Al(OH)3(s) + 3HCl(aq)to AlCl3(aq) + 3H2O(aq)

    asked by daisy
  107. Math for Liberal Arts

    Directions: Define the necessary symbols, rewrite the argument in symbolic form, and us a truth table to determine whether the argument is valid. If the argument is invalid, interpret the specific circumstances that cause the argument to be invalid.

    asked by Dawn
  108. PHYSICS (CHECK WORK)

    I am getting the wrong answer. Can you please check my work? My answer is off by a multiple of ten. A sample of an unknown material appears to weigh 295 N in air and 165 N when immersed in alcohol of specific gravity 0.700. (a) What is the volume of the

    asked by Amy
  109. English Capitalized

    aunt consuelo is consuelo melendez,doctor of dental surgery.

    asked by monica
  110. Organic chemistry

    Help me find my percent yield for my witting reaction experiment.... The weight of my final product was: 0.13 I put 0.40 g of benzyltriphenylphosphonium chloride, 0.23 g of 9-anthraldehyde and 1.0ml DMF and 0.5ml of aqueous sodium hydroxide into the flask

    asked by john
  111. language

    spade, sparkle, sparrow, special, specific, speckle, speech, spill, spirit, splash, splatter, splendid, split, spoke, spool, spouse, sprain, spring, sprinkle, spurt Write a letter using all the spelling words. make your spelling words in capital letters.

    asked by mythreyee
  112. economics

    The graph on the left shows the short-run marginal cost curve for a typical firm selling in a perfectly competitive industry. The graph on the right shows current industry demand and supply. a. What is the marginal revenue that this perfectly competitive

    asked by nika
  113. Chemistry

    Calculate the final temperature of a mixture of 200.0g of ice initially at -16.5 Celsius and 406.0g of water initially at 84.5 degrees Celsius.

    asked by Brittany
  114. 7th grade science help Ms. Sue please!

    1. Most of the life of any cell is spent in a period of growth called _____. (1 point) interphase prophase telophase anaphase 2. Which of these is the part of the cell that contains hereditary material? (1 point) chromosome interphase mitosis embryo 3. The

    asked by Delilah
  115. Accounting

    When calculating the times interest earned ratio, you you include "interest expense on debt extinguishment" in the interest expense? Thanks!

    asked by Connor
  116. chemistry

    A scientist isolates a gaseous compound. Is the compound ionic or covalent? Why?

    asked by ixchel
  117. Science- Chemistry

    How do I figure these out? A solution of sodium thiosulfate, Na2S2O3, is 0.1365 M. 29.28 mL of this solution reacts with 39.79 mL of I2 solution. What is the molarity of the I2 solution? 2(Na2S2O3) + I2↔Na2S4O6 + 2(NaI) 16.77 mL of the I2 solution from

    asked by Whitney
  118. math

    If there are 8 boys and 9 girls in Mr. Layden's classroom, what is the ratio of boys to girls?

    asked by Makayla
  119. international Business

    Think about what it might have been like to coordinate a meeting sixty-five years ago, before computers and conference calling. How would a business in Toronto have conducted business with someone in London, England, 65 years ago?

    asked by Jake E.
  120. Math

    What is the hourly growth factor of a bacterium that undergoes cell division every 19 minutes?

    asked by Juliette
  121. Calculus

    A 40-foot ladder is leaning against a house when its base starts to slide away. By the time the base is 32 feet from the house the base is moving at a rate of 4ft/sec. a. How fast is the top of the ladder moving down the wall at that moment? b. At what

    asked by Johnny
  122. Chemistry

    15.8 grams of potassium chlorate is decompossed and the gas is colected over water at 29 degrees celcius when water vapor pressure is 30 mmHg. Assuming 100% yeild of products, what is the total pressure in the vessel after the reaction in complete?

    asked by ash
  123. Physics

    A ballistic pendulum consists of an arm of mass M and length L = 0.485 m. One end of the arm is pivoted so that the arm rotates freely in a vertical plane. Initially, the arm is motionless and hangs vertically from the pivot point. A projectile of the same

    asked by Joe Frank
  124. physics

    A 74.0 kg ice skater moving to the right with a velocity of 2.58 m/s throws a 0.18 kg snowball to the right with a velocity of 24.4 m/s relative to the ground. (a) What is the velocity of the ice skater after throwing the snowball? Disregard the friction

    asked by Brandon
  125. chemistry

    1 2Mg + o2 --> 2Mgo 2 MgCo3 --> MgO + Co2 3 Co2 + Ca(OH)2 --> CaCo3 + h2O 4 Zn + 2HCl --> ZnCl2 + H2 5 2H2 + O2 ---> 2H2O 2 KI + Pb(NO3)2 --> 2KNO3 + PbI2 endothermic is absorbs energy. exothermic is releases energy. which of those reaction are

    asked by peter
  126. lanuage art

    3. Choose the correct vocabulary word for the following sentence: “We know the stranger came from a distance because of the _______ he spoke.” (1 point) criteria figurative language dialect

    asked by aliyah
  127. physics

    A 2.7 kg ball strikes a wall with a velocity of 7.8 m/s to the left. The ball bounces off with a velocity of 6.6 m/s to the right. If the ball is in contact with the wall for 0.19 s, what is the constant force exerted on the ball by the wall?

    asked by Brandon
  128. Physics

    Twelve uniform, thin rods of mass M and length L are welded together to form a hexagon "wheel." What is the moment of inertia of this wheel for rotation around an axis through its center and perpendicular to the plane of the wheel? (The welds contribute no

    asked by Joe Schmo
  129. Statistics

    Suppose the correlation between two variables is -0.57. If each of the y-values is multiplied by -1, which of the following is true about the new scatterplot? It slopes up to the right, and the correlation is -0.57 It slopes up to the right, and the

    asked by John
  130. Physics

    A particle moves with the acceleration a=2e(^-t)i+5cos(t)j In the instant when t=0 the particle is at the point r=i-3j with the velocity v=4i-3j. Calculate the velocity and position of the particle at any instant. I tried doing the problem and ended up

    asked by Leslie
  131. world history

    identify zhongguo

    asked by matt
  132. Business Stats 1

    Problem Set 7 1. As part of a marketing study, the Food King Supermarket chain has randomly sampled 150 customers. The average dollar volume purchased by the customers in this sample was $84.14, that is, the sample mean from a sample of size 150 was

    asked by Kody
  133. PHYSICS

    A 3.1 kg bundle starts up a 30° incline with 139 J of kinetic energy. How far will it slide up the plane if the coefficient of friction is 0.30?

    asked by KRISTEL
  134. S.S. 1 question

    5. What did delegates decide about how the number of representatives for each state would be determined? a. Each state would get a number of representatives directly proportional to its population. b. Each state would get a number of representatives

    asked by Jman
  135. math

    On vacation, Le Hong averaged 45 mph traveling from city A to city B. Returning by a different route that covered the same number of miles, he averaged 50 mph. What is the distance between the two cities if his total traveling time was 30 hours

    asked by Karina
  136. algebra 2

    Points R=(6,4), Q=(4,3), and P=(-2,b) are collinear. What is the value of b?

    asked by samantha godls
  137. probability

    Bag of marbles 6 blue, 2 green, 8 purple, 2 yellow and two orange, once a marble is drawn it is replaced. P(two greens in a row)

    asked by Anonymous
  138. Math

    Find the relative extrema, if any, of the function. Use the second derivative test, if applicable. g(x)=4x^2+7x+6 relative maximum (x, y) = (, ) relative minimum (x, y) = (, )

    asked by Teetee
  139. Social Studies

    What are some importance and reasons for monuments and forts in guyana?

    asked by Sasha
  140. physics

    Consider a pulse of laser light aimed at the Moon that bounces back to Earth. The distance between Earth and the Moon is 3.84 * 108 m. Show that the round-trip time for the light is 2.56 s

    asked by Shawn
  141. Pre Calc

    how much money should i invest at 8.2% compounded continuously if i wish to have $100,000 in 5 years?

    asked by Alyssa
  142. statistic

    The time necessary to assemble a discount store display is normally distributed with μ = 5 minutes and σ = 30 seconds. A large number of potential employees are timed assembling a practice display. How much time (in minutes) should the personnel manager

    asked by Coco
  143. physics

    three uniform thin rods, each of length L = 16 cm, form an inverted U. The vertical rods each have mass of 14 g; the horizontal rod has mass of 50 g. Where is the center of mass of the assembly (x, y)?

    asked by rafeh
  144. Definition-ish question. Geo

    What are examples of megalopolis?and whats a good definition for it? Thanks. ♥dino♥

    asked by rawr... im a dinosaur.... rawr
  145. math

    CALCULATE THE UNIT PRICE for o price at $3.96 17 ounces into cents/ounces

    asked by oliver arvey
  146. math

    you have an unlimited supply of 5% saline solution and 8% saline solution. How much of each type would you have to use to create 60 ounces of 7% saline solution? Write and solve a system of equations to model and solve this problem.

    asked by sahar
  147. Chemistry

    51.34 g of water at 81.5 oC is added to a calorimeter that contains 52.13 g of water at 40.7 oC. If the final temperature of the system is 59.4 oC, what is the calorimeter constant (Ccalorimeter) ? Use 4.184 J/goC for the heat capacity of water.

    asked by Brittany
  148. algebra

    -12a+3(2a+1)=-6a

    asked by sean
  149. physics

    A shopper in a supermarket pushes a loaded 32 kg cart with a horizontal force of 15 N. The acceleration of gravity is 9.81 m/s2 . a) Disregarding friction, how far will the cart move in 3.3 s, starting from rest? Answer in units of m

    asked by John
  150. chem

    why is hydrogen gas placed in the 1A column of the periodic table?

    asked by Jose
  151. maths

    A diamensions of a cuboid are in the ratio 4:3:1 and its total surface area is 950cm2 find the diamensions

    asked by chaithu
  152. math

    What is the percent by mass of oxygen in H2O? A. 11.1% O B. 50.0% O C. 88.9% O D. 95.0% O I think C

    asked by shana
  153. science

    when the beaker of water is heated what will happen to the level of water in the tube. this thermometer would be no use to measure the temperature in the freezer.write 2 sentences to explain why

    asked by cheryl
  154. college algebra

    write the function whose grapg is the graph of y=(x+5)^2, but is reflected about the y-axis. would it look like this: y=(x+5)-2??

    asked by ladybug
  155. Math for Liberal Arts

    Directions: Define the necessary symbols, rewrite the argument in symbolic form, and us a truth table to determine whether the argument is valid. If the argument is invalid, interpret the specific circumstances that cause the argument to be invalid.

    asked by Dawn
  156. English

    A sentence is a group of words expressing a complete though and each begin with a capital letter.

    asked by monica
  157. English

    An appositive is a noun that is placed after another noun in order to tell more about it and it's usually set off with commas.

    asked by monica
  158. chem

    A solution contains 4.60 g KCl in 179 mL of solution. The density of the KCl solution is 1.11 g/mL What is the percent (m/m) for the potassium chloride solution? What is the molarity, M, for the potassium chloride solution? need help pls

    asked by byke
  159. math

    The tow truck was towing a car, the car is 10 ft long and cast a shadow 23 ft long if the tow truck is 17 ft long how long is the shadow of the tow truck

    asked by cindy
  160. Chemistry

    Help me find my percent yield for my witting reaction experiment.... The weight of my final product was: 0.13 I put 0.40 g of benzyltriphenylphosphonium chloride, 0.23 g of 9-anthraldehyde and 1.0ml DMF and 0.5ml of aqueous sodium hydroxide into the flask

    asked by john
  161. Math

    Which equation is the equation of a line that passes through (–10, 3) and is perpendicular to y = 5x – 7? y = 5x + 53 y = –x – 7 y = –x + 1 y = x + 5 Help - I don't understand...being told it is C but why?

    asked by Deborah
  162. english

    Rewrite this passage using the corect punctuation..one suuny day mrs brown decided to take her family for a picnic in the new forest she made a big pile of sandwiches and put them in a plastic box colin packed some cans of coca cola for the children to

    asked by kina
  163. Chemistry

    If 0.10 mg Fe is diluted in a 50 mL flask, what is the concentration of the resulting solution? What volume of the resulting solution is needed to prepare 25.0 mL of a dilute sample solution with a concentration of 0.30 ppm Fe?

    asked by Lisa
  164. math

    I have 1 thousand, 12 tens, 2 hundreds, and 2 ones. What number am I?

    asked by lee
  165. physics

    What is the direction of a person that walks 6.0-km North-East, 4.0-km East, and 6.0-km South?

    asked by summer
  166. algebra

    a stone is thrown up from a height of 30 ft. The initial velocity is 60 ft/sec. If s(t)= -16t^2+60t+30. Find the time at which the stone riches its maximum height and find the maximum height

    asked by Anonymous
  167. math

    Suppose you have a $1,000 charge on a credit card charging 1% monthly interest using the adjusted balance method. The minimum payment due in May is $50. How much will you save in interest charges in June by paying $100 instead? $ 1

    asked by Anonymous
  168. us history

    1. income or money is called 2. a suggestion for a new law in congress is called 3. to make a change in the constitution is to make an 4. to help an enemy of your country is the crime of 5. a serious crime is known as

    asked by jr
  169. math

    how do you work out 5x-2y=4 3x+y=9

    asked by tink
  170. math

    24-(8/2)+6+

    asked by Anonymous
  171. Pre algebra

    find the area of the triangle with base 2 1/5 yards and height 5/8 yard.( The area of a triangle equals half the product of its base and height)

    asked by michael
  172. English

    The last three lines of Matthew Arnolds' "Dover Beach" "And here we are as on a darkling plain swept with confused alarms of struggle and flight Where ignorant armies clash by night What vision of post religious world and existence does Arnold present?

    asked by Anonymous
  173. PHYSICS CHECK WORK PLEASE

    I am getting the wrong answer. Can you please check my work? My answer is off by a multiple of ten. A sample of an unknown material appears to weigh 295 N in air and 165 N when immersed in alcohol of specific gravity 0.700. (a) What is the volume of the

    asked by AMY
  174. Business Math Question

    Find the finance charge per $100 on a loan of $12,600 with a finance charge of $1,638.

    asked by Will
  175. physical science

    how far was a box moved if 558.6 joules of work was done when a force 126Newtons was exerted to move the box?

    asked by Guadalupe
  176. physical science

    how far was a box moved if 558.6 joules of work was done when a force 126Newtons was exerted to move the box?

    asked by Guadalupe
  177. Physics

    A 3000kg satellite orbits the Earth 400km above the equator. find a)The speed of the satellite b) The kinetic energy of the satellite c) The potential energy of the satellite d) The total energy of the satellite

    asked by Dave
  178. Math

    Let f(x)=x^4-4x^3+10 Find the first derivative of the function. Find the critical values of the first derivative.

    asked by Britney
  179. Physics

    A 65.0 kg ice skater moving to the right with a velocity of 2.47 m/s throws a 0.18 kg snowball to the right with a velocity of 24.3 m/s relative to the ground. (a) What is the velocity of the ice skater after throwing the snowball? Disregard the friction

    asked by Dakota
  180. international Business

    What are the implications (problems) of these differences in time to a manager in London, Ontario who might need to coordinate a conference call among the following three locations: London (Canada), London (England), and Sydney (Australia)?

    asked by Jake E.
  181. international Business

    How have technological advances impacted a manager’s ability to span time zones when doing business?

    asked by Jake E.
  182. math

    find x whenx,33 and9 in proportion

    asked by romana
  183. international Business

    Think about what it might have been like to coordinate a meeting sixty-five years ago, before computers and conference calling. How would a business in Toronto have conducted business with someone in London, England, 65 years ago?

    asked by Jake E.
  184. calculus

    Find the equations of the tangents to the curve x^2+y^2=25 which pass though the point (-1,7)

    asked by Anonymous
  185. History

    How many states and territories were part of the United States in 1890? Was it 44...

    asked by Deborah
  186. History

    How many new states and territories were part of the United States in 1920 which were not part of the U.S. in 1890? 4 I think...?

    asked by Deborah
  187. Math

    The average of 7 numbers is 30. the average of the first to the fourth numbers is 32, the average of the third to the seventh numbers is 27. What is the sum of the third and the fourth numbers? I want the answer please.

    asked by Ryda
  188. math puzzle

    How do you add up numbers between 1 to 8 to get the sum of nine across, diagonally and horizontally in a box of nine squares?

    asked by Ianni
  189. college

    The measure of a third angle in an isosceles triangle is 82.5 more than the measure of the two equal angles. whats the angle of the third.

    asked by Anonymous
  190. health

    Question 11 of 20 5.0 Points Regular physical activity appears to reduce symptoms of ________ for children and adolescents. A. Anxiety and depression B. Low self-esteem C. Identity or role confusion D. All of the above i think it is b?

    asked by kayla
  191. biology

    provide information the muscles found within the forearm and hand

    asked by tina
  192. math

    How much wire should he buy if 2 windows are 15 ft. off ground and 2 houses are 32 ft. apart and trench is l ft. deep in order to install intercom between 2 houses?

    asked by joann
  193. Algebra

    I need help, my teacher says that I'm half way right with this but not fully what am I missing I'm confused. The criteria for the quadratic equation as i written is: y>0 is real roots y=0 is real and equal roots y

    asked by Angel
  194. algebra

    •What are two symbolic techniques used to solve linear equations? •Which do you feel is better? •Explain why

    asked by gail
  195. chemistry

    when Zn0 becames Zn++, where do the 2 electrons that are lost come from?

    asked by jack
  196. Statistics

    male heights are normaly distributed with a mean of 70 and a standard deviation of 2.8 inches. for two randomly selected guys, what's the probability that both of them are 67 inches or shorter? show calculations. Can someone please help me quickly with

    asked by Heather
  197. Physics

    When dealing with circular motion; a string with the length of .4m is being spun horizontally, is the radius .2m?

    asked by Troubled
  198. the excetional child

    could you check my answer please. a ssecere loss of hearing in a young child: a. is less detrimental to development than loss of vision. b. is more detramental than loss of vision. c. requires education in separate facility for all school years. d. should

    asked by tonia
  199. chemistry

    balanced equation for potassium nitrate(s)--->potassium nitrate(s)+oxygen(g)

    asked by lisa
  200. Chemistry

    find the volume of 56.4 g of a substance that has a density of 2.42 g/mL

    asked by Jean
  201. history

    difference between iroquois clan mother and iroquois headwoman

    asked by alexander
  202. MAth

    Write a six pairs of digits that make one number?

    asked by Bj
  203. college algebra

    For the given functions f and g find the following and state the domain of each. f(x)=sqrt x; g(x)=7x-3 A.what is the domain of f*g? B. What is the domain of f/g? Please show all work.

    asked by ladybug
  204. Geometry

    Distributive Property: -3(5x - 2) -3 (5x) (-2) -15x + 6 = x - 9 Is this correct???

    asked by Leslie
  205. Physics Projectile Motion

    What angle (from earth) should one shoot a projectile so that it reaches it's maximum?

    asked by Leslie
  206. math

    what is the answer to original : 9 new amount : 6

    asked by stephan
  207. Chemistry (henry's law and IGL)

    Can Henry's Law be used for gases that obey the Ideal Gas Law? What about gases that do not obey the ideal gas law? when can you use/Not use henry's law?

    asked by Ania
  208. math

    If there is a 75.0 g quantity of carbon present in each 100 g of a carbon and hydrogen compound, what is the percent composition of hydrogen in this compound? A. 25 g B. 25% C. 75 g D. 75% I say B

    asked by shana
  209. geography

    in Centrel Asia why are temperatures in this region often really cool at night, but sweitering hot during the days?

    asked by tony
  210. Math

    Jack divided his chocolate bar into 6 equal pieces. He gave 2 piece to Tristan and 1 piece to Emilio Which expression can be used to find the fraction of Jack's chocolate bar that he gave away A.1/2+1/3 B.1/3+1/6 C.1+(1/3+1/6) D.6-(1/3+1/6) D?

    asked by Jerald
  211. English

    According to authorities;only 35% of criminals go to jail

    asked by monica
  212. Social Studies 8R

    For social studies my teacher wants the class to write a paragraph about Obama winning the elections. It's just a repulsion paragraphs about how we feel when Obama won the election. Is there any REALLY GOOD vocab... like what's another words for happy or

    asked by Laruen
  213. college algebra

    for the function f(x)=7/x+6, find the average rate of change of f from 1 to x.

    asked by ladybug
  214. Chemistry

    The high acid rain which falls in the Northeast frees aluminum ions from the soils. The tree absorbs the aluminium ion. The sap is basic so the aluminium ion becomes aluminum hydroxide. Aluminium hydroxide is a large bulky molecule that plugs the

    asked by I need Help
  215. Math

    The cake perimeter is 72 inches. The length is 2 times the width, what is the area of the cake?

    asked by Ally
  216. Math

    What is the lowest term for 135/200?

    asked by Losa
  217. college algebra

    deteermine algebracially whether the given function is even,odd, or neither. f(x)= -3x-/9/

    asked by ladybug
  218. math

    How is percent composition calculated? A. Dividing the mass of each element in the compound by the total mass of the compound and then dividing by 100% B. Dividing the mass of each element in the compound by the total mass of the compound and then

    asked by shana
  219. Econ

    Coca-Cola in dispensers located on a golf course sells for $1.25 a can, and golfers buy 1,000 cans. Assume the course raises the price to $1.26 (assume a penny raise is possible) and sales fall to 992 cans. a. Using the midpoint formula, what is the price

    asked by Linda
  220. math

    what is 11/15 - 7/20

    asked by james
  221. algebra 2

    in an account that has 500 dollars and has an interest rate of 7.5% annually after 18 years would be what

    asked by paul
  222. Maths

    Simplify: 3-10+9.7 Simplify: 2+3.10 divided by 5.3-9 Simplify: 16-10 divided by 5+13

    asked by monica
  223. poetry

    American romantic writers rejected rationalism because they believed that

    asked by Anonymous
  224. Math

    limit of (x,y)--->(1,0) of ln(1+y^2/x^2+xy)) Find the limit, if it exists, or show that the limit does not exist.

    asked by Ms. Sue Please help!
  225. math

    one die is red the other is green both are rolled what is the probability of getting the following sums A)8 B)9 C)10

    asked by moriah
  226. physics

    What is the magnitude of displacement for a person that walks 6.0-km North-East, 4.0-km East, and 6.0-km South?

    asked by michaela
  227. physics

    What is the magnitude of displacement for a person that walks 6.0-km North-East, 4.0-km East, and 6.0-km South?

    asked by michaela
  228. algebra

    Write the standard form of the equation of the line through the given point with the given slope. Through: (3,-1) and (8,-4)

    asked by Sylvie
  229. Math pattern

    3, 125, 625, 125, 25, ??? I am thinking it is 10, 2?

    asked by Brian
  230. physics

    A newspaper carrier on delivery route travels 200.-m South-West and 300.-m West. What is the magnitude of the displacement?

    asked by michaela
  231. Social Studies 8R - Paragraph Check

    Please check my paragraph to see if it's good. If there any detials I should add please let me know. Also please let me know if there any grammar errors. Obama Win When Barack Obama was re-elected I was ecstatic. Obama is a really good president and he

    asked by Laruen
  232. Physics

    A ball is kicked off a field with sufficient force and a trajectory such that it travels horizontally 60m with a maximum altitude of 20m. What was the initial speed? What was the trajectory angle?

    asked by Billy
  233. trigonometry

    At what angle to the x-axis does the graph of y=sin x pass through (0,0)? Give numerical and visual evidence.

    asked by rachel
  234. science-please help due first thing tommorw

    the same alkali(sodium hydroxide)can be found in both hair gel and oven cleaner.explain why it is safe to put hair gel on your skin, but not on oven cleaner. plz help!Be as acurate as possible and it has to be an outstanding scientific explanation.

    asked by Amelia
  235. Math right?

    75 + 30n, n = 53 my answer is 1,1665 am I right?

    asked by Moby
  236. College Math 111

    Assuming evey year is 365 days, and that you were counting one dollar each second,how long would it take to count 3.803 trillion dollars? Write your answers as years+days,rounded to the nearest day

    asked by S
  237. physical science

    what are contibutions jj tomson made to the atomic theory and the experiment he conducted to find his dicovery

    asked by jes
  238. Math (Algebra 1)

    2y-z/x for x=-3, y-13, and z=5

    asked by Danielle
  239. language

    spade, sparkle, sparrow, special specific, speckle, speech, spill, spirit, splash, splatter, splendid, split, spoke, spool, spouse, sprain, spring, sprinkle, spurt Write a letter using all the spelling words. make your spelling words in capital letters.

    asked by mythreyee
  240. Grade 5 Math

    Carlette named three movies and asked students which movies they had seen. How could she best display this data so you can tell how many students saw all three movies?

    asked by Anonymous
  241. Math

    113.50 ? 114.50 ? 115.00

    asked by John
  242. Math

    A piece of aluminum with an unknown mass ios at 85c and is placed in a 2.00 liters of water at 25.0c. The final temperature becomes 33c. What is the mass of aluminum?

    asked by Dave
  243. gov hist

    The Federalist Papers are most important because they _____.

    asked by Anonymous
  244. Math

    Let f(x)=x^4-4x^3+10 Find the first derivative of the function. Find the critical values of the first derivative.

    asked by Renee
  245. gove hist

    What disagreement lead to the Three Fifths Compromise? Who were the opposing sides? What did each side argue?

    asked by Anonymous
  246. geography

    i need to know what influences they had

    asked by tony
  247. Math

    i am a three digit decimal whose digit in the tenths place is 4 times the digit in the hundredths place and 4 more than the digit in the thousandths place. who am i?

    asked by Tiffany
  248. physics

    A newspaper carrier on delivery route travels 200.-m South-West and 300.-m West. What is the magnitude of the displacement?

    asked by melissa
  249. physics

    A newspaper carrier on delivery route travels 200.-m South-West and 300.-m West. What is the direction of the displacement

    asked by melissa
  250. geography

    the list i gave you

    asked by tony
  251. physics

    What is the direction of a person that walks 3.0-km North and 4.0-km East?

    asked by summer
  252. geography

    thank you for your help:)

    asked by tony
  253. physics

    why and how does the blowing snow charge the fences?

    asked by katrina
  254. Maths

    1)how do you simplify 3xcos5x using trigometric functions 2)how do you simplify sin2xcos4x using trigometric functions

    asked by JESS
  255. Math (Algebra 1)

    2y-z --------- for x=-3, y=13, z=5 x

    asked by Dani
  256. probability

    Bag of marbles 6 blue, 2 green, 8 purple, 2 yellow and two orange, once a marble is drawn it is replaced. P(two greens in a row)

    asked by Anonymous
  257. reading

    son needs to use the word idioms in a sentence

    asked by Kim
  258. physics

    A pump slowly lifts 3.0*10^6 kg of water an average distance of 80.0m in 12minutes. 1) how much work is done in the first 12 minutes? 2)How much power is delivered by the pumps?

    asked by Anonymous
  259. Math

    Draw two scalene triangles that are not congruent, but have exactly five sets of parts (sides and angles) that are congruent. Make a drawing that is to scale. Label yourmeasurements.

    asked by Michelle
  260. Math

    How do I solve this absolute value inequality? Should I add two to both sides first? | -3n | - 2 = 4

    asked by Carly
  261. physics

    A sports car has a weight of 9,300 N and can accelerate from rest to a velocity of 30.0 m/s in a measured time of 11s.1)what is the mass of the car? 2) what is the kinetic energy of the car at the end of this acceleration?

    asked by tommy
  262. physics

    A 0.500 kg is thrown vertically upward from the ground with an initial speed of 12.0 m/s. Define the initial potential energy to be zero on the ground. What are the potential energy and kinetic energy of the ball at 2.50m above the initial position?

    asked by Jeff
  263. physics

    A car travels in a straight line for 4.8 h at a constant speed of 57 km/h . What is its acceleration? Answer in units of m/s

    asked by alex
  264. Fin

    A $50,000 loan is to be amortized over 7 years, with annual end-of-year payments.

    asked by Pam
  265. Physics

    A satellite is to be put into a circular low earth orbit at 149 km above surface. What orbital speed (km/s) is required?

    asked by Christine
  266. history

    the number of persons needed at a meeting in order for business to place is called

    asked by jr
  267. math

    1/7[4ln(x+9)-lnx-(x^2-25)]

    asked by bobby
  268. math

    Find the absolute maximum value and the absolute minimum value, if any, of the function. g(x)=x^2+9x^2/3 on [-7,8]

    asked by Britney
  269. physics

    A 1.54×10 3 kg car accelerates uniformly from rest to 12.7 m/s in 2.97 s. What is the work done on the car in this time interval? Answer in units of J 002 (part 2 of 2) 10.0 points What is the power delivered by the engine in this time interval? Answer in

    asked by Anonymous
  270. statistic

    Suppose a random sample of 25 students is selected from a community college where the scores in the final exam (out of 125 points) are normally distributed, with mean equal to 112 and standard deviation equal to 12. Find the probability that the sample

    asked by Coco
  271. Chemistry

    How do I change 3,3,4,4,5,5-hexamethyl-1-hexyne into it's molecular formula

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  272. math

    a store owner buys supplies from a vendor for $8,450. The terms of the sale are 2/10, n/30. What will be the net amount due if the owner pays by the 10th day after he receives the supplies

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  273. math

    24-(8/2)+6= (8/4)*(7*0)= 5*(6-3)+ 10/(8-3)= What order do you use to solve these problems

    asked by Anonymous
  274. math

    A man is six feet tall and casts a shadow 4 feet long. At the same time a child is 4.5 feet tall, how long is her shadow?

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  275. Physics

    0.2 kg of water at 30 degrees celsius is put into a freezer to make ice. Hoe much energy has to be removed from the water to freeze it?

    asked by A
  276. Algebra Grade 7

    How do I calculate the sales tax? And discount. Thanks in advance!! ♥dino♥

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  277. math organized list

    tonya and lauren are desinging a soccer uniform they want to use two colors on the shirt their choices are green orange yellow purple blue and silver how many ways can they choose two colors?

    asked by kevin
  278. Business Math Question

    Finance charge of $2.50 per $100 for 3 payments.

    asked by Will