# Maggie

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.

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

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

4. ## calculus

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

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

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

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?

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.

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?

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

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.

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)

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?

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.

15. ## Math

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

16. ## Trigonometery

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

17. ## PHYSICS

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

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

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

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

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

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%

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

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

25. ## calculus

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

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

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

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,

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

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

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

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?

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)

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?

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

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

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

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

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.

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

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?

42. ## math

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

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

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.

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?

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

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.

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?

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

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?

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

52. ## PHYSICS

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

53. ## Social Studies

Was Blitzkrieg a successfull war stratagy?

54. ## STOICHIOMETRY

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?

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?

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

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

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

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

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

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

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

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

64. ## English

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

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

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

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

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.

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.

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

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,

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 :)

73. ## english

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

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):

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

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

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.

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.

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.

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

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

82. ## math

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

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

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

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?

86. ## History

How did political machines maintain support of citizens?

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

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,

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.

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

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

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!!!!!!!

93. ## Math

Determine the solution set of 2x-3y

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,

95. ## Englishm

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

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

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

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

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?