# Jr

Most popular questions and responses by Jr
1. ## statistics

Lorraine was in a hurry when she computed a confidence interval for μ. Because σ was not known, she used a Student's t distribution. However, she accidentally used degrees of freedom n instead of n - 1. Will her confidence interval be longer or shorter

2. ## Teacher Aide

Which of the following factors contributes to the importance of teacher aides in schools today? a A decrease in the population b The decline of women in the workforce c The financial crisis in the school d Reduced teacher salaries

3. ## statistics

A researcher is interested in estimating the average salary of teachers in a large urban school district. She wants to be 95% confident that her estimate is correct. If the standard deviation is \$1050 (σ = 1050), how large of a sample is needed to be

4. ## Anthropology

Does anyone about cultural assumptions from anthropologist Laura Nader why does she say that this is the main motivation and why is the analysis important?

5. ## math

Yoga fun charges \$63 starting war plus \$12 per class. Yoga for all charges no starting fee and \$15 per class. For how many classes will the cost be the sameat both places plz explain

6. ## Social Studies

"communism is over in russia democracy will always prevail in the end." how does this statement most reflect a particular bias? it shows a prejudice against communism it shows support for democratic ideals it makes a prediction* it cites historical events

7. ## Physics

A hydrogen atom is at the earth's surface. The electron and proton in the atom are separated by a distance of 5.29x10^-11m. What is the ratio of the magnitude of the electrical force exerted by the proton on the electron to the weight of the electron?

8. ## DIFF CALCULUS

A swimming pool is 12 meters long, 6 meters wide, 1 meter deep at the shallow end, and 3 meters deep at the deep end. Water is being pumped into the pool at ¼ cubic meter per minute, and there is 1 meter of water at the deep end. a. What percent of the

9. ## Statistics

When a distribution is mound-shaped symmetrical, what is the general relationship among the values of the mean, median, and mode?

10. ## Chem

Determine the volume of 0.250M KOH solution required to neutralize each of the following samples of sulfuric acid. 200mL of 0.135M H2SO4. I have gotten both 0.027 and 0.675. I thought it was mol/L. Please help!

11. ## statistics

The correct size of a nickel is 21.21 millimeters. Based on that, the data can be summarized into the following table: Too Small Too Large Total Low Income 19 21 40 High Income 22 13 35 Total 41 34 75 Q: If 100 children are chosen at random, it would be

12. ## Chemistry

How many liters of nitrogen oxide at STP are produced from the reaction of 59.g of NH3? Balanced Equation: Ammonia reacts with oxygen to produce nitrogen oxide and water. 4NH3(g)+5O2(g)→4NO(g)+6H2O(g)

13. ## physics

In a long jump, an athlete leaves the ground with an initial angular momentum that tends to rotate his body forward, threatening to ruin his landing. To counter this tendency, he rotates his outstretched arms to "take up" the angular momentum. In 0.393 s,

14. ## physics

A 200-m-wide river flows due east at a uniform speed of 4.9 m/s. A boat with a speed of 9.0 m/s relative to the water leaves the south bank pointed in a direction 33o west of north. What is the (a) magnitude and (b) direction of the boat's velocity

15. ## algebra 1

what is the degree of the trinomial? a3+7ab-8b4

16. ## Math

how can i solve -10x+y=4?? i think it is impossible with one answer

17. ## mth

five pentagonal numbers that follow 22

18. ## chemistry

If the Kelvin temperature of 2 L of a gas at STP doubles, the new volume would be

19. ## chem

Assuming that all of the carbon dioxide ends up in the balloon, what will be the volume of the balloon at a temperature of 20 ∘C and a pressure of 734 mmHg ?

20. ## differential calculus

a pc of wire 10feet long is cut into 2 pcs. one piece is bent into the shape of a circle and the other into the shape of a square. how should the wire be cut so that the combined area is as large as possible?

21. ## java programming

Create a program that will generate lottery numbers for the user. There are two types of numbers in the lottery, the standard numbers 1-43 and the power ball number 1-60.There are three different lottery games, a three number game, a five number game with

22. ## physics

Some European trucks run on energy stored in a rotating flywheel, with an electric motor getting the flywheel up to its top speed of 120 ð rad/s. One such flywheel is a solid, uniform cylinder with a mass of 270 kg and a radius of 1.10 m. (a) What is the

23. ## statistics

True or false? Every random sample of the same size from a given population will produce exactly the same confidence interval for μ.

24. ## URGENT chemistry

What pressure is exerted by 0.625 mol of a gas in a 45.4 L container at -24.0ºC

25. ## PHYSICS

At 25 m from a sound source, the intensity level is 55 dB. What's the level at distance of 56m? What's the level at distance of 273m?

26. ## Math

Juanita is making necklaces to give as presents she plans to put 15 beads on each necklace beads are sold in packages of 20 what is the least number of packages she can buy to make necklaces and have no beads left over

27. ## math

A 1000·kg car traveling with a velocity of 13·m/s north collides head-on with a 2000·kg truck traveling with a velocity of 17·m/s south. Immediately after the collision, the velocity of the car is 11·m/s south. Taking north as the positive direction,

28. ## physics

A uniform spherical shell of mass M = 8.00 kg and radius R = 0.550 m can rotate about a vertical axis on frictionless bearings. A massless cord passes around the equator of the shell, over a pulley of rotational inertia I = 0.130 kg·m2 and radius r =

29. ## physics

Figure shows an overhead view of a 0.026 kg lemon half and two of the three horizontal forces that act on it as it is on a frictionless table. Force F1 has a magnitude of 4 N and is at ¥è1 = 27¢ª. Force F2 has a magnitude of 6 N and is at ¥è2 =

30. ## algerbra

the modern grocery has cashews that sell for \$4.75 per lb. and peanuts that sell for \$2.25 per lb. how much of each must the grocer mix to get a 100 lbs. of mixture that he can sell for \$3.00 per lb.express the probrlem as a system of linear equations and

31. ## Algebra 1

Hudson is already 40 miles away form home on his drive back to college. He is driving 65 mi/h. Write an equation that models the total distance d traveled after h hours.

32. ## physics

An 82 kg man lowers himself to the ground from a height of 6.6 m by holding onto a rope that runs over a frictionless pulley to a 66 kg sandbag. With what speed does the man hit the ground if he started from rest?

33. ## chemistry

Why do gases deviate from ideal behavior at very high pressures

34. ## Physics

calculate the acceleration of this system, assuming that there are no frictional forces between the table and Block A. Block A is sitting on a table connected by a rope to a pulley system and Block B is hanging off the table connected to the rope from the

35. ## MATH

for 30 days on the 1st daY I GET A PENNY THAN ON IT DUOBLES EVERY DAY UNTIL DAY 30 HOW MUCH PENNIES DO I HAVE ON DAY30

36. ## MATH

Suppose the mass of ball F is 0.5·kg. What is the impulse delivered to the ball by the floor? Ball going south at velocity 4 m/!@#\$%^&s floor and returns north velocity at 1 m/s

37. ## physics

Three identical stars of mass M = 6.4 x 1030 kg form an equilateral triangle that rotates around the triangle's center as the stars move in a common circle about that center. The triangle has edge length L = 5.0 x 1010 m. What is the speed of the stars?

38. ## physics

Zero, a hypothetical planet, has a mass of 5.7 x 1023 kg, a radius of 2.8 x 106 m, and no atmosphere. A 10 kg space probe is to be launched vertically from its surface. (a) If the probe is launched with an initial kinetic energy of 5.0 x 107 J, what will

39. ## algebra

is 5x + 2y = 8 look like horizontal, vertical, slanted right upwards,slanted right downwards?

40. ## algebra

use polynomial long division to divide 4x^3+6x^2+16x-10 by -x^2-2x-5 help me please

41. ## physics

Find the distance by which a 43cm diameter, 8.7m tall concrete column is compressed when it supports a 12400kg load

42. ## Calculus

a rifle aimed horizontally and 5 feet above level ground fires a bullet with a muzzle velocity of 3000 ft/sec. How far does the bullet travel from the end of the muzzle before it strikes the ground? (Ignore air resistance)

43. ## math

How long is the side of a square picture that can fit inside a circular picture frame that has a diameter of 8 inches? Hint: Pythagorean Theorem

44. ## economic systems

what are the three spin-off jobs that are directly related to the auto industry? parts manufacturer, parts distributor, body shops, glass shops, auto radio installer, designer, etc. Car washes, programmers (for auto electronics). I can list hundreds of

45. ## Physics

An astronaut is at rest 1.0 m away from his shuttle when his jet malfunctions and his hand-held radio dies. unable to reach his shuttle to return to safety, a) what can the astronaut do to get himself back to his ship? b) Which of Newton's three laws would

46. ## math

23 divided by 6=3.83333333333 the 23 is my points and i divide it to find my gpa how do i round the answer

47. ## math

2-|2x-5|=0 explain

48. ## physics

Suppose the mass of ball F is 0.5·kg. What is the impulse delivered to the ball by the floor? Ball going south at velocity 4 m/!@#\$%^&s floor and returns north velocity at 1 m/s

49. ## Math

describe the pattern you could use to complete the following grid, and then complete it. 0.22 __ __ __ 0.84

50. ## math

find the vertex, the line of symmetry, the max or min value of f(x)=2x^2-8x+16

51. ## Math

Can someone please show me how to find an answer for this? I forgot how to add them to get the answer. 2x +12= 6x +4 =

52. ## Physics

An object moves a to b, 4kms due west and then moves from b to c, 3kms due north. Find the displacement

53. ## math

Anthony's older brother is 5 1/6 feet tall, Anthony's younger brother is 2 6/7 feet tall, about how much taller is Anthony's older brother than his younger brother. I got 2 feet?

54. ## math

7 2/5 - 2 3/4 = I need to show how I got the answer

55. ## comparing fractions

15/16 greater,less than or equal to 3/8

56. ## math

write the first five terms of a geometric sequence whose first term is 100 and whose third term is less than 30

57. ## us history

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

58. ## math

The principal is choosing between 2 field tripS. The firt costs 600 dollars. The 2nd costs \$240 plus \$40 per students. For wat # of students is the 1trip less expensive?

59. ## statistics

What are the values of the mean and standard deviation of a standard normal distribution? μ = σ =

60. ## Calculus

a rifle aimed horizontally and 5 feet above level ground fires a bullet with a muzzle velocity of 3000 ft/sec. How far does the bullet travel from the end of the muzzle before it strikes the ground? (Ignore air resistance)

61. ## math

a vertical pole 5 feet long casts a shadow of 2 feet if at the same time a nearby shadow of 10 feet how tall is the tree

how many 2/3s are in 6?

63. ## Math

Ok, I got the addition down, I have a few that have subtraction in them: 8x -40=14x +2=

64. ## chemistry

f the pressure of 2 L of a gas at STP doubles, the new volume would be

65. ## Science

An aluminium cube measures 10 cm on each side. The density of aluminium is 2.7g/cmÃ¢â‚¬â€œÃ‚Â³. What is the cube's mass? I need help regarding the formula.

66. ## Physics

I drop an object from a height of 500.0 m. How long does it take to hit the ground?

67. ## math

Write an expression for the problem, then evaluate. Tickets for children in a carnival cost 150. A teacher of a class of 48 pupils gets for the whole class but only 43 pupils buy. Is it right for the teacher to say that she has 6,350 for the tickets of the

68. ## math

In a certain eatery, there are 5 glass racks having 24 glasses and 8 left over. The answer says there are 130 glasses in all. Is it right? Why?

69. ## budgeting and forecasting

Paint Sales Time Series Week Sales (000’s of gallons) 1 6 2 8 3 10 4 9 5 11 6 12 7 10 8 8 9 7 10 9

70. ## math

While warming up for track meet,Anna jogged for 17/20 of a mile. Katie jogged for 3/5 of a mile. How much farther did anna jog?

71. ## math

Zach is walking to his best friend's house, which is 5 1/3 blocks away, so far he has walked 2 5/6 blocks. How many more blocks does he need to walk?

72. ## math

wendy is making two different recipes for nut bread. One recipe call for 1/8 cup of nuts the other call for 3/4 cup of nuts. How many cups of nuts will wendy need in all?

73. ## math

4 5/8 + 9 3/5 = rename or simplify as needed

74. ## Math

rename or simplify as needed 11 1/4 - 5 8/9

75. ## history

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

76. ## english

what is the definition of motivation from literature

77. ## math

4(3) exponent is 2

78. ## math

23 divided by 6=3.83333333333 the 23 is my points and i divide it to find my gpa how do i round the answer

79. ## math

3x squared x=4

80. ## math

i know the square root of 36 is 6 but wat if their was a negative sign in side the square root box. Then one outside the box not inside and one on both places

81. ## math

square root of -64

82. ## math

JUSTIFIES A STEP IN THE SOLUTION OF AN EQUATION 4n+(7+n)=52 4n+(n+7)=52 (4n+n)+7=52 5n+7=52 5n+7-7=52 5n=45 5n/5=45/9 n=9

83. ## matn

JUSTIFIES A STEP IN THE SOLUTION OF AN EQUATION 4n+(7+n)=52 4n+(n+7)=52 (4n+n)+7=52 5n+7=52 5n+7-7=52 5n=45 5n/5=45/9 n=9

-1/2m > -7

85. ## physics

A 30lb sand bag falls off a hot air balloon floating stationary 5000ft above the ground what is the speed of the bag at the moment it hits the ground?

86. ## math

5-(T-3)= -1+2(T-3)

87. ## math

-h-7= -13 explain on how to the variable while theirs a negative in front of it

88. ## algebra

multiply (-x-1)(-4x^2-2x+2)

89. ## intermediate algebra

joe has a collection of nickles and dimes that is worth \$3.95. if the number of dimes was doubled and the number of nickles was increased by 21, the value of the coins would be \$8.40. How many nickles and dimes does he have? show all your work. help me

90. ## math

If jim and john saved money in the ratio of 8:12,how much did john save if together they saved \$400?

91. ## chemistry

A gas occupies 10 liters at a pressure of 40.0 mm hg. What is the volume when the pressure is increased to 60.0 mm hg

92. ## Algebra

Solve the quadratic equation. x^2 – x = 56

93. ## Algebra

The Political Noise Problem. The amount of background noise is important to television news reporters. One station developed the formula N = -t2 + 10t + 56 showing the noise level in decibels (N) as it relates to the time after the speaker stops talking in

x+5=-3

32.1=a-21.8

96. ## English

How do I determine the tone of a sentence? And how do I change that tone. Tone: http://www.tnellen.com/cybereng/lit_terms/terms/3terms.html#Tone http://web.cn.edu/kwheeler/lit_terms_T.html "TONE: The means of creating a relationship or conveying an

1. ## Physics

Along the surface of the hill, toward the top of the hill

posted on May 24, 2018

1. heart rate temperature weight

posted on June 21, 2017
3. ## math

jbjj

posted on February 22, 2016
4. ## math

Didn't help

posted on April 21, 2015