Popular questions and responses by Maggie
  1. 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
  2. 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
  3. 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
  4. calculus

    Find the centroid (¯ x, ¯ y) of the region bounded by: y = 6x^2+7x, y = 0, x = 0, and x = 7

    asked on March 12, 2017
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. math

    Find four numbers that form a geometric progression such that the third term is greater than the first by 12 and the fourth is greater than the second by 36.

    asked on November 24, 2019
  12. 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
  13. 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
  14. calculus

    Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis. y = 64x−8x^2, y = 0; about the y-axis.

    asked on March 2, 2017
  15. Math

    I am between 40 and 50 and I have 17 ones. Who am I?

    asked on February 16, 2017
  16. 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

    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
  18. Physics

    A person is riding a bicycle, and its wheels have an angular velocity of 17.7 rad/s. Then, the brakes are applied and the bike is brought to a uniform stop. During braking, the angular displacement of each wheel is 12.4 revolutions. (a) How much time does

    asked on October 30, 2012
  19. 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

    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
  21. 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
  22. 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
  23. science

    Which of the following would increase the effect of tides on Earth (high tides get higher, low tides get lower) - slowing the rate of rotation of the Moon. - increasing the rate of rotation of the Moon. *** - decreasing the distance between the Earth

    asked on September 23, 2017
  24. 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
  25. calculus

    Find the area of the region enclosed by the parametric equation x = t^3−3t y = 6t^2.

    asked on May 8, 2017
  26. 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
  27. 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
  28. math

    Mrs. Smith was complaining about her teenagers drinking too much soda. Her three teens drank two cases of soda every five weeks. Mrs. Jones replied that her six teens go through five cases every four weeks. Who drinks more soda in a week on the average,

    asked on February 7, 2017
  29. 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
  30. 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
  31. 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
  32. 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
  33. 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
  34. 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
  35. 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
  36. biology

    Which of the following statements about sexual and asexual reproduction is FALSE? a. Genetic diversity occurs in sexual reproduction. b. Asexually reproducing organisms can repair their own DNA. c. There are no special reproductive cells in asexual

    asked on April 9, 2010
  37. physics

    An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? a) That there is no reaction force-the net force on the object is zero, so the

    asked on November 22, 2009
  38. physics

    An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? a) That there is no reaction force-the net force on the object is zero, so the

    asked on November 22, 2009
  39. 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
  40. 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
  41. 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
  42. math

    Find the equations of at least three lines that intersect each other at the point (6, -2).

    asked on February 7, 2017
  43. math

    Mrs. Jones wants to go shopping so she asks her husband for some money. Being busy, he just tell her to take what she needs out of his wallet. She first stops and buys a coat which costs her half of her money plus $2. She then stops and buys a dress, which

    asked on January 26, 2017
  44. 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
  45. algebra

    How do I rewrite this equation using radicals instead of rational exponents? I rewrote the whole equation in simplest form 25x^(11/10)4√y How do I rewrite it with radical exponents?

    asked on April 6, 2015
  46. Math Help

    Hello! Can someone please check and see if I did this right? Thanks! :) Directions: Find the exact solutions of the equation in the interval [0,2pi] cos2x+sinx=0 My answer: cos2x+sinx=cos^2x-sin^2x+sinx =1-sin^2x-sin^2x+sinx =-2sin^2x+sinx+1=0

    asked on February 2, 2015
  47. statistics

    An average of 1.4 private airplanes arrive per hour at an airport. Let x denote the number of private airplanes that will arrive at this airport during a given hour. Calculate the probability distribution of x. Find the probability that x = 4.

    asked on May 28, 2014
  48. chemistry

    how does the solubility of gases in water compare to the solubility of solids in water as the temperature of the solution increases?

    asked on April 2, 2013
  49. College History

    Which of the following was NOT a result of the great migration of blacks in the 1920s? A) Blacks found they someetimes were able to work in jobs that has been closed to them in the South. B) African American consciousness was raised, providing feelings of

    asked on November 30, 2012
  50. 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
  51. 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

    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
  53. Social Studies

    Was Blitzkrieg a successfull war stratagy?

    asked on April 19, 2011

    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
  55. health

    if a person has stooped breathing and is receiving pulmonary resuscitation, would it be better to administer pure oxygen or a mixture of carbon dioxide/oxygen?why?

    asked on December 16, 2009
  56. physics

    An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? I think the answer is B but not sure. a) That there is no reaction force-the net

    asked on November 23, 2009
  57. physics

    An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? a) That there is no reaction force-the net force on the object is zero, so the

    asked on November 22, 2009
  58. physics

    An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? a) That there is no reaction force-the net force on the object is zero, so the

    asked on November 21, 2009
  59. math

    Am I right? Let p and q represent the following statements: p: The fourth of July is not Independence Day q: Christy,as comes twice a year Express the following statement symbolically: The fourth of July is Independence Day Answer: ~p

    asked on June 5, 2008
  60. 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
  61. 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
  62. physics

    a rock weighing 20.0N falls from a height of 16.0m and sinks 0.600 m into the ground. from energy considerations, find the average force between the rock and the ground as the rock sinks. (avg. force) x (distance sunk) is the3 work done by the soil in

    asked on September 13, 2006
  63. English

    Sonia’s Blog Who I Am, What I Do – Every Day Saturday, June 18 The zoo! I visited the zoo with mom today. It’s the same zoo with mom Today. It’s the same zoo she visited with her Mom. Mom said she remembers that the first thing you would see was a

    asked on May 7, 2020
  64. English

    Do I have to start every sentence with a Capital even if it has a comma?

    asked on May 7, 2020
  65. Math

    Evan said the numbers 0.37,0.36,0.25 and 0.4 were in order from greatest to least . Is he correct? Explain

    asked on November 14, 2019
  66. 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
  67. 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
  68. math

    you have two coins in your pocket. Together they are worth 30 cents. one of the coins is not a nickel. What coins do I have in my pocket.

    asked on August 22, 2018
  69. 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
  70. 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
  71. 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
  72. 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
  73. english

    in the scarlet letter how was roger leaving hester for 7 years worse than what dimmesdale's sin

    asked on March 30, 2017
  74. calculus

    Consider the series ∑ ∞ n=1 (13/10^n) Determine whether the series converges, and if it converges, determine its value. Converges (y/n):

    asked on March 24, 2017
  75. 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
  76. 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
  77. calculus

    Find the volume of the solid obtained by rotating the region bounded by the curves y = x^8, y = 1 about the line y = 5.

    asked on March 2, 2017
  78. calculus

    Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified line. x = 1−y^4, x = 0; about x = 1.

    asked on March 2, 2017
  79. math

    Give an example of an open interval, and an example of a set that is not an open interval. Use proper set notation and explain.

    asked on February 19, 2017
  80. 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
  81. math

    You are going to build a glass box. The length of the box is 8 inches more than the width and the height is half the length. The length of the wire to make the frame is 108 inches. 1.What are the dimensions of the box? 2.All six faces of the box will be

    asked on February 4, 2017
  82. math

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

    asked on January 26, 2017
  83. 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
  84. math

    San Pablo is having a festival. Tickets for children under 12 cost $2, adult tickets are $6 and senior citizen tickets are $3. One sixth of the tickets sold were children’s tickets. The 40 senior citizens with tickets sat in the shade under the trees and

    asked on January 26, 2017
  85. math

    A family decides to grow flowers in their garden. They have 56 feet of fence they want to cut into two pieces to make two square gardens. How long should each piece be if they want the total area of the squares to be 100 square feet?

    asked on January 26, 2017
  86. History

    How did political machines maintain support of citizens?

    asked on November 27, 2016
  87. Chem: pH of acids and bases

    Calculate the concentrations of all species in a 0.320-M solution of H2X if K1 = 6.31E-06 and K2 = 3.71E-09 [H2X] = [H3O1+] = [HX1-] = [X2-] = Work: H2X + H2O --> HX- + H3O+ .320 M This is literally the only thing I know. How can there be two different

    asked on October 24, 2016
  88. 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
  89. 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
  90. 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
  91. Math

    the product of two consecutive positive even integers is 14 more than their sum .set up an equation that can be used to find the two numbers and solve it

    asked on March 1, 2016
  92. 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
  93. Math

    Determine the solution set of 2x-3y

    asked on February 21, 2015
  94. 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
  95. Englishm

    Write two paragraphs about how social media has changed the way you think about written communication.

    asked on September 13, 2014
  96. Chemistry

    Calculate the amount of energy in calories that is needed to melt 45g of ice at -20°C and then increase the temperature to 95°C

    asked on February 6, 2014
  97. 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
  98. 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
  99. math 3rd

    I have to subtract 1.- 0.98765= I think it should be 1.98765 but I used the calculator to see if it was right and I get 0.01235 don't understand how that could be right?

    asked on January 8, 2014
  100. Math

    When a student sold an xbox on ebay for $153, she was charged a two part final value fee: 5.25% of the first $25.00 of the selling price plus 3.25% of the remainder of the sell price over $25.00. Find the fee to sell the xbox on ebay.

    asked on August 19, 2013


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