# Questions Asked onMarch 25, 2016

1. ## Polynomials

Write and simplify the polynomial represented by the model. (Model shows: 3 big blank squares, 2 long black rectangles, 3 small blank squares, 1 big black square, 6 small black squares) a. -2x^2 + 2x + 3 b. 2x^2 - 2x - 3 c. 3x^2 - 2x - 3 d. 2x^2 - 2x + 3

2. ## Probability

A couple plans to have three children. What is the probability that a) they have all boys? b) they have at least one girl?

3. ## English

What does pestilence mean as it is used in the following lines from Act V,Scene 2 of Romeo and Juliet? Friar John:Going to find a barefoot brother out,One of our order,to associate me, Here in this city visiting the sick, and finding him,the searches of

4. ## chemistry

Explain using the dilution formula how to prepare 0.2M HCL acid from 37% HCL acid

5. ## physics

A centrifuge in a medical laboratory rotates at an angular speed of 3,550 rev/min. When switched off, it rotates through 54.0 revolutions before coming to rest. Find the constant angular acceleration (in rad/s2) of the centrifuge.

6. ## Algebra

A train covered the distance of 400 km between A and B at a certain speed. On the way back it covered 2/5 of the distance at that same speed and then it decreased its speed by 20 km/hour. Find the speed of the train at the end of its journey from B back to

1) What conclusion can you draw about the comparative advantages other countries have in farming over Japan and the Koreas? 2) What conclusion can you draw about the government's influence on daily life in North Korea? Explain your reasoning. My answer:

8. ## Probability

The letters in the word MATHEMATICS are arranged randomly. What is the probability that the first letter is E? Preview What is the probability that the first letter is M?

9. ## Probability

A computer password is required to be 9 characters long. How many passwords are possible if the password requires 2 letter(s) followed by 7 digits (numbers 0-9), where no repetition of any letter or digit is allowed?

10. ## Math

Indira is wrapping the box with a length of 8 in. , a width of 6 in. , and height of 3 in. How much wrapping paper does she need?

11. ## math

A person going to a party was asked to bring 5 different bags of chips. Going to the store, she finds 14 varieties. How many different selections can she make?

12. ## Chemistry

If 116g of butane burns in presence of 320g of oxygen, how much carbon dioxide will be produced? What is limiting reagent? So This is how I worked it out: 116gC4H10*1/58.12(molar mass of C4H10)*8 moles CO2/2 moles C4H10*44/1(molar mass of CO2)=351.27g of

13. ## chemistry

The formation constant* of [M(CN)4]2– is 7.70 × 1016, where M is a generic metal. A 0.170-mole quantity of M(NO3)2 is added to a liter of 1.040 M NaCN solution. What is the concentration of M2 ions at equilibrium?

14. ## math

In a lottery game, a player picks 9 numbers from 1 to 43. How many different choices does the player have if order doesn't matter?

15. ## Algebra

A tourist traveled on a motorboat against the current for 25 km. And then returned back on a raft. In the boat the tourist traveled for 10 hours less than on the raft. Find the speed of the current if the speed of the motorboat in still water is 12

16. ## Chemistry

How many grams of nitrogen are present in 2 moles of HNO3?

17. ## math

A metal worker has a metal alloy that 30% copper and another one is 55% copper. how many kilograms of each alloy should the metalworker combine to make 50kg of a 50% copper alloy?

18. ## English

what does sojourn mean as it is used in the following lines from Act V,Scene 3 of Romeo and Juliet? Prince:This letter doth make good the friar's words, Their course of love, the tidings of her death: And here he writes that he did buy a poison of a poor

19. ## Finance

. On the day that you were born, your grandfather opened a savings account in your name. At that time, he deposited a certain amount of money into the account, and has deposited the same amount on each of your first 20 birthdays. Today is your 21st

20. ## Math

f the air temperature at ground level is 90degrees°​F, the air temperature x miles high is given by ​T(x)equals=90minus−19x. Determine the altitudes at which the air temperature is from 52degrees°F to 42.5degrees°F.

21. ## Math

A store manager set up a cardboard display to advertise a new brand of perfume. The display is a square pyramid whose base is 18 inches on each side. The height of each triangular face of a puramid is 12 inches. How much cardboard was used to make the

22. ## Trigonometry

1. sin^2 theta+cos theta=2 (Hint: Use the Pythagorean identity sin^2 theta+cos theta=1 to replace sin^2 theta in the given equation.) I got no solution

23. ## geometry

What is the ratio of the area of sector AOB to the area of sector COD? 1/3,1/4,1/9,3/8

24. ## Probability

If you randomly select a card from a well-shuffled standard deck of 52 cards, what is the probability that the card you select is a heart or King?

25. ## Math

the circumference of mars is 10.664km find the diameter mars to the nearest km A.17.256Km B.3.396km C.333 D.259

26. ## math

A number consists of two digits whose sum is 9. if three times the number is equal to eight times the number formed by interchanging the digits. find the number

27. ## math

A metal worker has a metal alloy that 15% copper and another one is 70% copper. how many kilograms of each alloy should the metalworker combine to make 120kg of a 48% copper alloy?

28. ## Algebra

Two High Schools ordered AP Chemistry text book from the same book store. A New Hampshire school has ordered 80 copies, while a Vermont school ordered only 55 copies. The store has 70 books in its warehouses in Massachusetts and 100 books in the other

29. ## Probability

In the 6/54 lottery game, a player picks six numbers from 1 to 54. How many different choices does the player have?

30. ## physics

An air puck of mass m1 = 0.24 kg is tied to a string and allowed to revolve in a circle of radius R = 1.4 m on a frictionless horizontal table. The other end of the string passes through a hole in the center of the table, and a mass of m2 = 1.3 kg is tied

31. ## physics

A 2.00 kg ball moving to the right at 10.0 m/s makes an off-center collision with a stationary 3.00 kg ball. After the collision, the 2.00 kg ball is deflected upward at an angle of 30o from its original direction of motion and the 3.0 kg ball is moving at

32. ## Physics

Find The Potential Energy Of A Boy Mass 10kg Standing On A Building Floor Of 10 Metres Above Ground Level. 10*10*10 =1000

33. ## Probability

If you randomly select a card from a well-shuffled standard deck of 52 cards, what is the probability that the card you select is a 3 or King? (Your answer must be in the form of a reduced fraction.)

34. ## AP Chemistry

Suppose the three gases were placed at 1.00 atm and 273 K in closed containers, as shown below. A tiny hole is opened in each container, allowing each gas to diffuse into another container filled with neon gas. What is the ratio of the rate of diffusion of

35. ## Ethics

Consequentialist theories of moral decision making would have us focus primarily on: A. our relevant moral duties. B. the “goodness” of the actual or expected consequences of the actions. C. the development of moral character. D. the struggle to

36. ## math

Maggie has a box of 300 colored blocks.The box has a equal number of green and blue blocks and an equal number of red and yellow blocks.If Maggie arranged all of the green blocks in stacks of 10 and all of the blue blocks in stacks of 7,how many yellow

37. ## statistics

A factory finds out that on the average 20% of bolts produced by the given machine will be defective.if 10 bolts are selected at random from the day's production of this machine,find the probability that 1.exactly 2 will be defective. 2. 2 or more will be

38. ## pysics

A 50.0-kg child stands at the rim of a merry-go-round of radius 1.65 m, rotating with an angular speed of 3.00 rad/s. (a) What is the child's centripetal acceleration? m/s2 (b) What is the minimum force between her feet and the floor of the carousel that

39. ## Math

The point ( -1.5,-2) is reflected across the y-axis, What are the coordinates of the point after the reflection?

40. ## Algebra

A train covered the distance of 400 km between A and B at a certain speed. On the way back it covered 2/5 of the distance at that same speed and then it decreased its speed by 20 km/hour. Find the speed of the train at the end of its journey from B back to

41. ## Algebra

A small tailors’ company wants to use at least 130 yards of fabric to sew evening skirts and dresses. A dress requires 4 yards of fabric and the production of a skirt will need 3 yards. Research shows that they will be able to sell at most three times as

42. ## Social Studies check my answers

1. Mexico's Central Plateau is an impotent region because A. it is a mountain's region where few people live, but minerals are mined. B. most of the country's people live there. C. it is a place where active volcanoes and earthquakes make life difficult D.

43. ## Ethics

Life, justice, and happiness are typically considered to be: A. intrinsic goods. B. instrumental goods. C. intrinsic evils. D. non-moral values. is it A

44. ## Algebra

A small tailors’ company wants to use at least 130 yards of fabric to sew evening skirts and dresses. A dress requires 4 yards of fabric and the production of a skirt will need 3 yards. Research shows that they will be able to sell at most three times as

45. ## Basic Arithematics

Waseem buys jeans worth Rs6650. He gets a rebate of 6% on it. After getting the rebate, he pays sales tax@ 10%. Find the amount he will have to pay for the jeans.

46. ## physics

Suppose a 1800-kg car passes over a bump in a roadway that follows the arc of a circle of radius 18.4 m as in the figure shown below. (a) What force does the road exert on the car as the car passes the highest point of the bump if the car travels at 9.24

47. ## Math

Johns car can travel 26 miles on a gallon of gas. There are 2.5 gallons of gas in the tank. How far can jones car travel using the gas in the tank . 2.5 + 26 = 5.1

48. ## Math

Add twenty-seven and thirty-six hundredths, eight and nine hundredths, and sixty-five and seventy-three thousandths

49. ## Ethics

Codes of ethics are best understood as: A. general principles. B. detailed solutions to ethical problems. C. formal laws with prescribed punishments. D. All of the above is it D

50. ## algebra

A large swimming pool has a perimeter of 1,028 meters, this rectangular-shaped pool is 40 meters longer than 5 times its width. Find its dimensions. width m length m

51. ## Ethics

The primary purpose of ethical inquiry is to: A. find all the possible solutions to a problem. B. critically reflect upon how we live and the choices we make. C. learn about the philosophies of the past 2000 years. D. memorize relevant codes of conduct. is

52. ## Physical

The specific heat of aluminum is 0.897 J/g•°C. Which equation would you use to calculate the amount of heat needed to raise the temperature of 0.75 g of aluminum from 7°C to 29°C? A. Q = 0.75 g x 0.385 J/g•°C x 22°C B. Q = 0.75 g x 0.385 J/g•°C

53. ## physics

A rotating wheel requires 6.00 s to rotate 27.0 revolutions. Its angular velocity at the end of the 6.00-s interval is 97.0 rad/s. What is the constant angular acceleration (in rad/s) of the wheel?

54. ## Chemistry

What volume of concentrated hydrochloric acid (12.0 M HCl) is required to make 2.0 liters of a 3.0 M HCl solution?

55. ## Math

Tericho earns \$8.80 per hour working at an ice cream shop. Janelle's earning at a drugstore follow the pattern in the table. Number of hours:3= \$25.50, 7=\$59.50, 12=\$102 and 20=\$170. Who makes more money per hour? By how much? . Thanks.

56. ## physics

A body falling from a high tower travels 40m in the last 2.71 sec of its fall to ground. What is the height of the tower?

57. ## chemistry

Explain using the dilution formula how to prepare 0.2m HCL acid from 37% HCL acid

58. ## Physics

A Boy Of 20KG Climbs 10m.Take 10m/s. Calculate the workdone,

59. ## Social Studies

Which of the following is a cultural exchange that the people of Japan have taken part in? A)Japanese material arts have become popular around the world*** B)Japanese government-style has been adapted by many other nations C)The Shinto religion is popular

60. ## math

Laptop screen sizes are determined by the length of the diagonal portion of the screen. A laptop has a 12 inch width and the height measures 10 inches draw a diagram and calculate the screen size.

61. ## phy

A car of mass 1400kg moving south at 11m/s collides into another car of mass 1800kg moving east at 30m/s.The cars are stock together after the collision.Determine the velocity of the cars immediately after the collision.

62. ## physics

In a popular amusement park ride, a rotating cylinder of radius R = 3.10 m is set in rotation at an angular speed of 4.20 rad/s, as in the figure shown below. The floor then drops away, leaving the riders suspended against the wall in a vertical position.

63. ## geometry

2004-06-01-04-00_files/i0320000.jpg Find the volume of the cone. Round your answer to the nearest hundredth.

64. ## math

A couple plans to have three children. What is the probability that a) they have all boys? Preview b) they have at least one girl?

65. ## Algebra

Bakery has bought 250 pounds of muffin dough. They want to make waffles or muffins in half-dozen packs out of it. Half a dozen of muffins requires 1 lb of dough and a pack of waffles uses 3/4 lb of dough. It take bakers 6 minutes to make a half-dozen of

66. ## Chemistry

When a balloon filled with 1.249 g of hydrogen explodes, the hydrogen reacts with 9.99 g of oxygen to form water vapor. Assuming water vapor is the only product formed, how much water vapor is produced?

67. ## Math

Mrs. Mati is setting up two rest stops for a race. There are 24 gallonsvof lemonade total at the two stops.The second stop has twice as many as the first stop.How many gallons of lemonade are at each rest stop?

68. ## mathematics-probability

. A die is rolled four times, what is the probability of obtaining exactly one six show workings #thanks

69. ## physics

A satellite of mass 2500kg is orbiting the Earth in an elliptical orbit.At the farthest point from the Earth,its altitude is 3600km,while at the nearest point,it is 1100km.calculate the energy and angular momentm of the satellite and its speed at the

70. ## ~ CHEMISTRY ~

If k is a constant, how will a change in volume change the pressure? Choose one set of numbers. Assign one of them to represent P and the other to represent V. What happens to P if V is assigned the larger number? What happens to P if V is assigned the

71. ## math

I am a three digit number the sum of my digits is 10. my first digit and my last digit are the same what number am i? A 181 B 262 C 343 D 505

72. ## math

How many bricks of 22 centimetre x 10 centimetre x 7 centimetres are required to construct up a wall 33 metre long 3.5 metre high and 40 centimetre thick if cement and sand used in the construction occupy 110th the part of the wall

73. ## Calculus

Suppose x; y, and z are positive numbers that sum to 10. What is the largest possible value of xy + xz + yz? (a) First, suppose that z is a fixed parameter. Then we have to find nonnegative numbers x and y (depending on the fixed value z such that x+y =

74. ## AP Chemistry

A solution is prepared by titrating a 100.0 mL sample of 0.10 M HF (Ka = 7.2 × 10-4) with 0.10 M NaOH. A)What is the pH after 20.0 mL of the 0.10 M NaOH is added? Show all calculations.

75. ## Math

What is the perimeter of a isosceles triangle that has 2 sides that are 22 inches?

76. ## Physics

Synthetic diamonds can be manufacated at pressures of 6.00 x 10 in power 4 atm . If we took 2.00 litres of gas at 1.00 atm and compressed it to a pressure of 6.00 x 10 in power 4 atm , what would the volume of that gas be ?

77. ## statistics

A store owner receives 12 computers:nine are model A and the rest are model B.if two computers are sold at random,find the probability that one of each model is sold.

78. ## Chemistry

Calculate the standard internal energy change for the formation of water at 298K. The standard enthalpy of formation of water at 298K is - 285.8 KJ/mol.

79. ## mathematics-probability

. A die is rolled four times, what is the probability of obtaining exactly one six show workings #thanks

80. ## Maths

2Sin tita+2Cos tita=1.5.find tita

81. ## science

Two positive point charges of 12 * 10 ^-6 and 8 * 10 ^-6 respectively are placed 10 cm apart in air .the work done to bring them 4cm closer

asked by two positive charges of 12*10^-6 and 8 * 10 ^-6 r
82. ## Math

Approximate .68 inch to the nearest eighth of an inch

83. ## physics

A body falling from a high tower travels 40 m in the last 2.71sec of its fall to the ground. What is the height of the tower?

84. ## physics

A satellite of mass 2500kg is orbiting the Earth in an elliptical orbit.At the farthest point from the Earth,its altitude is 3600km,while at the nearest point,it is 1100km.calculate the energy and angular momentm of the satellite and its speed at the

85. ## English

1. Walls have ears. 2. The walls have ears. -------------- Which one is correct? ============================ 3. Lunch is on me. - What do you mean by "lunch is on me"? - I mean I will pay for the lunch. ----------------------- In the last sentence, do we

86. ## Calculus

Suppose you are in a room that is a*10 meters. You can walk normally along the "a" meter long wall at "s" meters per second and crab walk in any direction at 1 meter per second. You start at one corner of the room, walk normally along the wall of length

87. ## Algebra

An investor invested a total of \$1900 in two mutual funds. One fund earned a 6% profit while the other earned a 2% profit. If the investor's total profit was \$94, how much was invested in each mutual fund?

88. ## Algebra

simplify the expression using rational exponents (27x^−1 ⋅ y^−1)divided by (x^2 ⋅ y^3)1/3

89. ## physics

a horizontal disk is rotating counter -clockwise about its axisof of symmetry at 14rps.Its rotational inertia with respect to its axis of symmetry is8kgm^2.A second disk,of

90. ## math

Explain how you knew whether the sum was in simplest form in problem #1. 5 3/8 plus 2 1/4 (the fractions are mixed numbers)

91. ## algebra 1 or pre algebra

for some real number b, the graph of the line y=3x+b passes through the point (7,-3).what its y-intercept?

92. ## physics

what is the effective weight of a person of mass 60kg carried vertically up in a rocket with an

93. ## Pre-Calc

An exponential function may have a coefficient. In these cases, the equation is often written as f(x) = ab^x, where a is the real-number coefficient and b is the base. Find the value of f(-3) given that f(2) = 6 and f(0) = 54. My answer: a = 54, b = 0.33,

94. ## Science

Radius of an iron sphere is0.21m if density of iron is 7.80g calculate the mass

95. ## english

The relationship between these two sentences are: Comparison Is this correct Many Hispanic girls celebrate their fifteenth birthday in a special way. Similarly, Anglo girls have a special party for their “sweet” sixteenth birthday

96. ## SS

in order to be a governor of georgia, a person must have been a U.S. citizen for at least how many years?

97. ## maths

A man gave 3 upon 8 of his property to his son and 1 upon 4 to his wife. What part of his property did he give to his son and wife.. .. .. ???????

98. ## Algebra 1

Fred would like to get at least a C in the class. He got a 68 on the first test. Write an inequality and then solve to find out what Fred would need to get on his next test to have a C in the class. • C≥68 (I honestly do not know how to even start this

99. ## Chemistry

How can dilute a 1 M HCl solution to obtain 100 mL of HCl solution 0,1 M?

100. ## Chemistry

using a 6.0M stock solution and a 2.5M stock solution, create two 0.01M solutions of hydrochloric acid with a 250mL volume

101. ## English

Does anyone know the theme of the short story the diamond mine by Willa Cather?