Most popular questions and responses by Maggie
  1. Economics

    An industry currently has 100 firms, all of which have fixed costs of $16 and avg. variable cost as follows: Q Avg. Variable Cost ($) 1 1 2 2 3 3 4 4 5 5 6 6 a. Compute marginal cost and avg. total cost. b. the price is $10. what is the total quantity

    asked on December 13, 2006
  2. Math

    A sample of 4 different calculators is randomly selected from a group containing 47 that are defective and 29 that have no defects. What is the probability that all four of the calculators selected are defective? Round to four decimal places.

    asked on July 16, 2017
  3. Physics

    A flowerpot falls from a windowsill 25.0 m above the sidewalk. A. How fast is the flowerpot moving when it strikes the ground?? B. How much time does a cat on the sidewalk below have to move out of the way before the flowerpot hits the ground? (Please

    asked on August 21, 2016
  4. Physics

    Many hot-water heating systems have a reservoir tank connected directly to the pipeline, so as to allow for expansion when the water becomes hot. The heating system of a house has 74 m of copper pipe whose inside radius is 9.10 10-3 m. When the water and

    asked on April 6, 2008
  5. History

    Can someone please check my answers? :) 1. What was the greatest threat to a slave family’s stability? (1 point) the birth of a new baby an increase in cotton production *** a marriage in the slaveholder’s family the slaveholder’s acquisition of new

    asked on January 21, 2014
  6. Math

    Caleb's family room has the dimensions 5 1/4yd wide and 3 7/8yd long. he needs to find the area of the room so that he knows how much carpet to buy.

    asked on April 12, 2016
  7. Trigonometery

    What is the graph of one cycle of a sine curve with the given characteristics? Using the form y = a sin bθ, what is an equation for the sine curve? amplitude = 4, period =1/4 pi , and a < 0

    asked on June 2, 2016
  8. Pre-Cal

    Assuming that you invest $12,000 in Japan, how long (to the nearest year) must you wait before your investment is worth $17,000 if the interest is compounded annually? The rate is 0.5%

    asked on February 9, 2018
  9. physics

    A mass m is gently placed on the end of a freely hanging spring. The mass then falls 29.8 cm before it stops and begins to rise. What is the frequency of the oscillation?

    asked on November 27, 2011
  10. Intro to Trig

    Which of the following best corresponds to the x-value where the function f(x)=cos x is a minimum in the interval x = [25,30]? A) 25.1 B)26.7 C)28.3 D)29.8 Can someone show me how to solve this step by step? Thanks :)

    asked on April 19, 2017
  11. Math (check answers)

    ultiple Choice 1. What is a reasonable distance between two cities? (1 point) 200 km ** 200 m 200 cm 200 mm 2. Which value correctly completes the statement? 6,501.5 km = ______ m (1 point) 6,501,500 ** 65,015 650,150,000 650.15 3. Find the perimeter of

    asked on March 27, 2017

    2Al + 3CuSO4 ! Al2(SO4)3 + 3Cu What is the maximum amount of Cu (63.5 g/mol) that could be produced by reacting 20.0 grams of Al (27.0 g/mol) with excess CuSO4?

    asked on November 4, 2010
  13. chemistry

    determine the concentration of NH3(aq) that is required to dissolve 775 mg of AgCl(s) in 100.0 mL of solution. The Ksp of AgCl is 1.77× 10–10.] please help!!!!!!!

    asked on April 3, 2015
  14. chemistry

    a mixture of methane and ethane is stored in a container at 294 mmHg. The gases are burned in air to form co2 and h2o. if the pressure of co2 is 357 mmhg measured at the same temperature and volume as the original mixture, calculate the mole fraction of

    asked on December 4, 2010
  15. physics

    A billiards ball of mass 0.4⁣kg strikes another, initially stationary ball of the same mass. The first ball is deflected and travels at an angle of 30∘ with its original direction. Its initial speed was 12⁣m/s and after the collision, it is 8m/s.

    asked on October 11, 2017
  16. Algebra 1 (HELP PLEASE!!)

    The United States Mint reported at the end of 2006 that the unit cost of producing and distributing a penny was 1.21 c. What percent of the value of a penny is this cost? What can you conclude about the cost of making pennies? • How can a model help you

    asked on September 14, 2011
  17. College Chemistry

    The Cu2+ ions in this experiment are produced by the reaction of 1.0 g copper turnings with excess nitric acid. How many moles of Cu2+ are produced?

    asked on October 7, 2010
  18. Organic Chemistry

    If one gram of aspirin is dissolved in 100mL of water at 37 degrees celsius, how much aspirin will precipitate out of solution when it is cooled to 25 degrees celsius?

    asked on April 9, 2017
  19. Social studies

    Why were backcountry colonists more self - sufficient than plantation owners a) they had more slaves to help them b) Farming along the cost provided everything they needed c)living near the breadbasket provided them with enough money for their cash crops

    asked on September 7, 2017
  20. College Chemistry

    If your heating generates soot on the bottom of the crucible, what is the origin of the soot? How will this soot collection affect x? x is the mols of waters of hydration

    asked on February 23, 2014
  21. Math

    Mona opened a savings account with a $500 deposit and a simple interest rate of 5.6%. If there were no deposits or withdrawals, how much money is in the account after 8/1/2  years

    asked on February 3, 2014
  22. Physics

    Jack rides his skateboard a total distance of 120 m in 20 sec. What was his speed? 5 seconds after he started Jack was at a distance of 30 meters. 10 seconds after he started he was at a distance of 70 meters. What was Jack’s speed from time = 5 sec to

    asked on February 27, 2014
  23. english

    how do you use juxtapose and lethargy in a sentence that relates to the tradgedy of julus caesar?

    asked on February 26, 2008
  24. calculus

    A mass is oscillating on the end of a spring. The distance, y, of the mass from its equilibrium point is given by the formula y=6zcos(10wt) where y is in centimeters, t is time in seconds, and z and w are positive constants. (a) What is the furthest

    asked on February 4, 2011

    A gas cylinder contains a mixture of carbon dioxide and oxygen, which have different molecular masses. The contents of the cylinder are in thermal equilibrium. Which of the following statements is correct? Question 1 options: A) All carbon dioxide

    asked on August 16, 2011
  26. Physics

    A mass m at the end of a spring vibrates with a frequency of 0.936 Hz. When an additional 558 g mass is added to m, the frequency is 0.634 Hz. What is the value of m?

    asked on November 27, 2011
  27. calculus

    Campbell’s Soup Company requires that is its tomato soup containers have a capacity of 64 in^3 , have the shape of a circular cylinder, and be made of aluminum. Determine the radius and height of the container that requires the least amount of metal.

    asked on August 2, 2016
  28. Physics

    A star rotates in a circular orbit about the center of its galaxy. The radius of the orbit is 6.2 x 1020 m, and the angular speed of the star is 4.3 x 10-15 rad/s. How long (in years) does it take for the star to make one revolution around the center?

    asked on October 30, 2012
  29. math

    Arturo is putting 18 erasers into equal rows. He says there will be more in 2 equal rows than in 3 equal rows. Is Arturo correct? Explain.

    asked on March 21, 2018
  30. math

    what did the witty raindrop exclaim to all the others

    asked on February 4, 2010
  31. chemistry

    Ethylene glycol, C2H6O2, is used as antifreeze for automobile engines. If you want to produce 2.00 kg of ethylene glycol from the reaction of C2H4Cl2 and Na2CO3, what is the minimum amount of Na2CO3 that is needed? C2H4Cl2(l) + Na2CO3(s) + H2O(l)=C2H6O2(l)

    asked on April 27, 2012
  32. Social Studies

    How did rivers affect the location of early civilizations? People often settled near shoals where it was easier to cross the river. *** People typically settled away from rivers and other bodies of water. People usually settled near rivers where rapids

    asked on August 26, 2019
  33. English

    1. What warning does prince escalus give the capulets and montagues? 2. What agreement do Paris and lord capulet reach? 3.why does Romeo go to the capulets part?

    asked on April 20, 2016
  34. math

    The 2008 yearbook at Middleton Middle School had 236 candid pictures of students.The 2007 yearbook had 214 candid pictures of students.To the nearest tenth, what was the percent of change in the number of candid student pictures from 2007 to 2008

    asked on January 31, 2014
  35. U,S, History (please help)

    Who was responsible for writing the amendments that later became the bill of rights?? A) George Washington** B) Patrick Henry C) George Mason B) James Madison I think it's A, but I'm not sure, it would mean the world if someone could please check my

    asked on October 9, 2017
  36. Algebra 2

    Participants in a study of a new medication received either medication A or a placebo. Find P(placebo and improvement). You may find it helpful to make a tree diagram of the problem on a separate piece of paper. Of all those who participated in the study,

    asked on May 18, 2016
  37. math

    The length of the highway is 500 miles. If 1 inch represents 100 miles, what is the length of the highway on the map? If on a scale drawing 55 feet are represented by 20 inches, then a scale of 1/8 inch represents how many feet? If 1 inch represents 55

    asked on February 11, 2014
  38. College Chemistry

    how many grams of metallic copper are required to react with the number of moles of Cu2+ , 0.16mol, to form CuCl overall reaction can be taken as: Cu2+(aq) + 2 Cl- (aq) + Cu(s)-->2CuCl(s)

    asked on October 7, 2010
  39. Physics

    A Ferris wheel 26.0m in diameter rotates once every 19.0s What is the ratio of a person's apparent weight to her real weight at the top and at the bottom? Please help! I know there are other questions similar to this but none of the answers are helping me,

    asked on February 20, 2015
  40. Physics

    A weight is hung from the ceiling of an elevator by a massless string. under which circumstances will the tension in the cord be the greatest? smallest? a.) The elevator rises with decreasing speed b.) The elevator rises with increasing speed c.) The

    asked on December 11, 2012
  41. stats

    TABLE 1 The general manager of a chain of pharmaceutical stores reported the results of a regression analysis, designed to predict the annual sales for all the stores in the chain (Y) – measured in millions of dollars. One independent variable used to

    asked on July 4, 2011
  42. calculus

    A tank in the shape of an inverted right circular cone has height 10 meters and radius 16 meters. It is filled with 5 meters of hot chocolate. Find the work required to empty the tank by pumping the hot chocolate over the top of the tank. Note: the

    asked on March 11, 2017
  43. English / Grammar

    Please check the following sentences and let me know if they are correct. Thank you in advance!! Rewrite the following sentences, focusing on the grammar area specified before the sentence. If the sentence is already correct, write No Change. Punctuation

    asked on July 6, 2007
  44. Social Studies.

    Hello. Here's the question: What creates a need for exchanging currencies? A.) Trade between cities in the same country. B.) A trade route through north to south India. C.) Trade between different countries ***? (Exchanging Currencies is the exchange of

    asked on April 24, 2019
  45. Math

    the average life expectancy in canada is 80.1 years. Estimate the country's life expectancy in hours? I know the answer is 700,800 but I cant for the life of me figure out how they get that! Thanks

    asked on May 20, 2008
  46. Chem 2

    If we burn a strip of magnesium in air, there will be two main products, magnesium oxide and magnesium nitride. If we then treat that mixture with water, the nitride ion is converted to ammonia. After boiling away the water and ammonia, we would be left

    asked on January 13, 2013
  47. math

    Use Simpson's Rule and all the data in the following table to estimate the value of the integral (with 7 at the bottom, 13 at the top) ydx. x 7 8 9 10 11 12 13 y -5 -2 6 7 8 0 -4

    asked on February 8, 2017

    The latent heat of fusion of water is 3.34 x 105 J/kg. A farmer places a barrel containing 1000 kg of water in his barn one winter's night. When the water cools to 0oC, it begin to freeze. How much heat does the water give out while it is freezing until it

    asked on August 15, 2011
  49. Physics

    A bungee jumper with mass 61.3 kg jumps from a high bridge. After reaching his lowest point, he oscillates up and down, hitting a low point eight more times in 31.8 s. He finally comes to rest 25.3 m below the level of the bridge. Calculate the spring

    asked on November 27, 2011
  50. math

    Suppose n, a are integers. If n divides a, then n divides a^2.

    asked on January 26, 2017
  51. biology

    When Darwin published his theory of evolution, he included all of the following ideas EXCEPT the idea that a. species changed slowly over time. b. some organisms become less suited to their environment then others. c. evolution occurs in spurts after major

    asked on April 9, 2010
  52. calculus

    A cable hangs between two poles of equal height and 40 feet apart. At a point on the ground directly under the cable and x feet from the point on the ground halfway between the poles the height of the cable in feet is h(x) = 10+(0.1)*(x^1.5). The cable

    asked on March 3, 2017
  53. Finance

    Risk exposure due to heavy short-term borrowing can be compensated for by: A. carrying more receivables to increase cash flow. B. carrying highly liquid assets. C. carrying illiquid assets. D. carrying longer term, more profitable current assets.

    asked on November 15, 2009
  54. Physics

    A robot probe drops a camera off of the rim of a 239 m high cliff on Mars, where the free-fall acceleration is -3.7 m/s^2. A. Find the time required for the camera to reach the ground. B. Find the velocity with which it hits the ground.( shown work will be

    asked on August 21, 2016
  55. Math

    A scale drawing has a scale of 1/4 in. :6ft. Find the length on the drawing for each actual length a.18ft b. 66ft c. 204ft

    asked on February 10, 2014
  56. history

    "Having undertaken, for the Glory of God, and advancements of the Christian faith and honor of our King and Country, a voyage to plant the first colony in the Northern parts of Virginia, do by these presents, solemnly and mutually, in the presence of God,

    asked on October 2, 2017
  57. Biology

    The number of oyster beds in Chesapeake Bay,which is an arm of the Atlantic Ocean,is dwindling rapidly.what effect would this have on the surrounding area?On the human community?

    asked on May 10, 2011
  58. physics

    1)A fire hose held near the ground shoots water at a speed of6.5 mps At what angle should the nozzle point in order that the water land 2.5 meters away? Answers: 18 degrees and 72 degrees 2) A long jumper leaves the ground at 45 degrees above the

    asked on November 22, 2011
  59. college algebra

    Kiran drove from City A to City B, a distance of 242 mi. She increased her speed by 10 mi/h for the 351-mi trip from City B to City C. If the total trip took 12 h, what was her speed from City A to City B?

    asked on September 30, 2015
  60. economics

    In the article about the financial problems of USA Today, Newsweek reported that the paper was losing about $20million a year. A Wall Street analyst said that the paper should raise its price from 50 cents to 75 cents, which he estimated would bring in an

    asked on October 23, 2009
  61. Physics

    Small, slowly moving spherical particles experience a drag force given by Stokes’ law: where r is the radius of the particle, is its speed, and ç is the coefficient of viscosity of the fluid medium. (a) Estimate the terminal speed of a spherical

    asked on September 29, 2010
  62. 7th Grade Math

    The experimental probability of hearing thunder on any given day in Ohio is 30%. Out of 600 days, on about how many days can Ohioans expect to hear thunder? Is my answer 420 days? I multiplied 600*.30=180, then I subtract 180 from 600 and got 420.

    asked on April 28, 2016
  63. Accounting

    Appalachian Register, Inc. (ARI) has current sales of $50 million. Sales are expected to grow to $75 Million next year. ARI currently has accounts receivable of $10 million, inventories of $15 million and net fixed assets of $20 million. These assets are

    asked on August 1, 2008
  64. visual

    "Street, Dresden", 1907, oil on canvas by Ernst Ludwig Kirchner. Describe the shapes in this painting. Are the shapes organic or geometric? Which ones? Describe how the shapes interact, or "touch" each other. Are the edges of the shapes soft or hard? Do

    asked on September 15, 2012
  65. Chemistry (urgent)

    Hi, I have a few chemistry problems that I'm having trouble solving. I put my attempted solutions after the problems in *'s. There was one problem I had no idea how to solve. What concentration of silver chromate (Ksp = 9.0 x 10-12) will dissolve to make a

    asked on April 12, 2010
  66. LA

    Read the passage. What technique is the author using to develop point of view? Though zoos are meant to be a joy to viewers and teach lessons about our earth, the zoo jails its inhabitants and passes on faulty knowledge A) State a claim B) Persuasive

    asked on April 22, 2016
  67. chem

    How do you prepare a solution of 12 M HCl and want to prepare 500 mL of a 0.4 M solution. Assume you have a 500-mL volumetric flask

    asked on October 16, 2012
  68. Physics

    An object acted on by three forces moves with constant velocity. One force acting on the object is in the positive direction and has a magnitude of 6.1 ; a second force has a magnitude of 4.0 and points in the negative direction. Find the direction of the

    asked on September 15, 2009
  69. math

    Bill ran into his neighbor from across the hall and asked her how old her children were. She replied, “Let’s see if you can figure it out. The product of their ages is 72 and the sum of their ages is the same as my apartment number.” Bill thought for

    asked on January 26, 2017
  70. calculus

    Suppose that an arrow was fired vertically upward from a crossbow at ground level and that it struck the ground 20 seconds later. If air resistance may be neglected, find the initial velocity of the bolt and the maxim altitude that it reached.

    asked on August 2, 2016
  71. chemistry

    how would you solve the mass of sucrose, C12H22O11, that is needed to make 550ml of a 0.25M solution?

    asked on April 14, 2013
  72. algebra

    How do I state which property of exponents justifies each step of this simplification?: 3^2x^6z^10/2^2y^18*x^4y^4z^4/5z^3*27z^6/2^2x^2y^3 Im really stuck on this problem, I've managed to figure out the first 5 problems but this one is troubling me.

    asked on April 9, 2015
  73. visual

    "Street, Dresden", 1907, oil on canvas by Ernst Ludwig Kirchner. Describe the shapes in this painting. Are the shapes organic or geometric? Which ones? Describe how the shapes interact, or "touch" each other. Are the edges of the shapes soft or hard? Do

    asked on September 15, 2012
  74. Physics

    A mass sitting on a horizontal, frictionless surface is attached to one end of a spring; the other end is fixed to a wall. 5.5 J of work is required to compressed the spring by 0.16 m. If the mass is released from rest with the spring compressed, it

    asked on November 27, 2011
  75. health

    If a person has stopped breathing and is receiving pulmonary resuscitation, would it be better to administer pure oxygen or a mixture of oxygen and carbon dioxide? Why?

    asked on December 17, 2009
  76. Physics

    A mouse pushes a piece of cheese with a mass of 6.4 g for a distance of 75 cm over a frictionless surface. He exerts a constant 0.5 N force as he does so. If the cheese starts from rest, what is it's final velocity? there is no time or speed givin, which

    asked on December 5, 2012
  77. math/ algebra?

    a lab technician draws a sample of blood. A cubic millitmeter of the blood contains 22^3 white blood cells and 22^5 red blood cells. What is the ratio of white blood cells to red blood cells?

    asked on October 28, 2011
  78. chemistry--URGENT, PLEASE HELP

    What concentration of silver chromate (Ksp = 9.0 x 10-12) will dissolve to make a saturated solution in water? *For this one the formula is Ag2CrO4, which is [Ag]^2[CrO4]. I plugged x in for CrO4, so x^3 is equal to Ksp. I then got that x = 2.0e-4.

    asked on April 12, 2010
  79. Chemistry

    Hi, I have a few chemistry problems that I'm having trouble solving. I put my attempted solutions after the problems in *'s. There was one problem I had no idea how to solve. What concentration of silver chromate (Ksp = 9.0 x 10-12) will dissolve to make a

    asked on April 12, 2010
  80. geography

    The factor that is forcing many South Asians to move to cities is a. religious conflict in rural areas. b. the threat of landslides in coastal areas. c. lack of arable land due to a growing population. d. dry conditions in the Indo-Gangetic Plain C?

    asked on April 8, 2010

    A body of mass 100.0g is attached to a hanging spring whose force constant is 10.0 kN/m. The body is lifted until the spring is in its unstretched state. The body is then released. Using the law of conservation of energy, calculate the speed of the body

    asked on September 13, 2006
  82. Math

    The ratio of boys to girls on a school trip was 5.7. There were 56girls. How many boys were on the trip

    asked on January 25, 2019
  83. algebra

    Find a special factoring pattern for a difference of two sextics: (a^6-b^6).

    asked on April 6, 2015
  84. Math

    Steve can kayak at 8 km/h in still water. On the river, Steve and the kayak travel slower upstream due to the current. It takes him 1.5 h for a trip downstream, but 3.25 h for the same distance upstream. Determine the speed of the river’s current.

    asked on June 19, 2013
  85. algebra

    A tugboat goes 180 miles upstream in 15 hours. The return trip downstream takes 10 hours. find the speed of the tugboat without a current and the speed of the current

    asked on August 9, 2012
  86. Chemistry

    I have a certain concentration of NaCl (in mg/L). I have to convert it to ppm Na+. I read some of the previous posts, and I understand that if I don't know the density, I should assume that 1ppm = 1mg/L. Does this also apply to ppm Na+ since there is 1 Na+

    asked on February 20, 2007
  87. math

    In the card game “Match,” the loser has to double the money of the other players. Juan, Jamal and Joey are playing. First Juan loses and doubles the money of Jamal and Joey. Joey loses the next hand and doubles the money of Jamal and Juan. Jamal loses

    asked on February 7, 2017
  88. calculus

    A circular swimming pool has a diameter of 20 meters, the sides are 3 meters high, and the depth of the water is 2.5 meters. The acceleration due to gravity is 9.8 m/s2 and the density of water is 1000 kg/m3. How much work is required to: (a) pump all of

    asked on March 12, 2017
  89. Algebra

    Amy bought 18 stamps. Some were for postcards and cost 35 cents. The others were for regular mail and cost 49 cents. She spent $7.28 on the stamps. How many of each did she buy?

    asked on October 30, 2016
  90. math

    When Melissa was born, her parents put $8,000 into a college fund account that earned 9% simple interest. Find the total amount in the account after 18 years.

    asked on February 3, 2014
  91. mah

    When Melissa was born, her parents put $8,000 into a college fund account that earned 9% simple interest. Find the total amount in the account after 18 years.

    asked on February 3, 2014
  92. Business math

    PROBLEM 1 The video discusses the requirements of a package to qualify as freight. A package must weigh at least 151 pounds. It must be palletized, stackable, forklift-friendly and shrink-wrapped or banded for stability. The uniform cargo footprint can be

    asked on April 11, 2013
  93. physics

    Each of the four wheels of a car push on the road with a force of 4.0*10^3 N [down]. The driving force on the car is 8.0*10^3 N [W]. The fictional resistance on the car is 6.0*10^3 [E]. Calculate the following A) the mass of the car B) the net force on the

    asked on March 29, 2012
  94. College Chemistry

    what is the maximum weight of CuCl that can be prepared from the reaction sequence using 1.0g of Cu turnings to prepare the Cu2+ solution?

    asked on October 7, 2010
  95. History

    Explain the Mandate of Heaven. thank you! :)

    asked on September 26, 2007
  96. teacher aide

    lesson - 02604500 - helping abused children

    asked on March 14, 2015
  97. probability

    I am lost. How do I figure this out? I know there are 2 ways to get the sum of 5 but do I count it backwards too? 1+4 4+1. How do I know how many sums? Joe rolled two fair number cubes that have faces labeled 1 to 6 each. He rolled the two cubes 180 times.

    asked on May 27, 2014

    A saturated solution of CaSO4(aq) is made in a beaker until there is excess calcium sulfate resting at the bottom. Then solid potassium sulfate is added. Which of the following is true? (The Ksp for potassium sulfate is larger than the Ksp for calcium

    asked on April 12, 2010
  99. calculus

    A force of 4 pounds is required to hold a spring stretched 0.1 feet beyond its natural length. How much work (in foot-pounds) is done in stretching the spring from its natural length to 0.6 feet beyond its natural length?

    asked on March 9, 2017
  100. Physics

    An arrow is shot straight up from the edge of a cliff with an initial velocity of 50 ft/s. Answer the following questions using English units. The acceleration due to gravity has a magnitude of 32.2 ft/s. A. Find the time to reach the highest point.

    asked on August 21, 2016


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