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

    asked on February 18, 2012
  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

    asked on March 9, 2013
  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

    asked on October 29, 2012
  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?

    asked on February 28, 2019
  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

    asked on October 3, 2012
  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

    asked on May 15, 2019
  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?

    asked on June 26, 2014
  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

    asked on October 18, 2014
  9. Statistics

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

    asked on February 3, 2012
  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!

    asked on May 8, 2014
  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

    asked on August 19, 2014
  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)

    asked on July 28, 2014
  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,

    asked on March 15, 2011
  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

    asked on January 26, 2011
  15. algebra 1

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

    asked on May 14, 2012
  16. Math

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

    asked on April 20, 2019
  17. mth

    five pentagonal numbers that follow 22

    asked on January 14, 2014
  18. chemistry

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

    asked on September 5, 2008
  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 ?

    asked on December 1, 2016
  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?

    asked on July 10, 2013
  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

    asked on April 7, 2012
  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

    asked on February 24, 2011
  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.

    asked on February 18, 2012
  24. URGENT chemistry

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

    asked on September 7, 2008
  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?

    asked on July 16, 2012
  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

    asked on August 29, 2017
  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,

    asked on October 27, 2011
  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 =

    asked on February 24, 2011
  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 =

    asked on January 26, 2011
  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

    asked on December 8, 2008
  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.

    asked on November 17, 2015
  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?

    asked on January 26, 2011
  33. chemistry

    Why do gases deviate from ideal behavior at very high pressures

    asked on September 5, 2008
  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

    asked on November 19, 2013
  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

    asked on October 29, 2012
  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

    asked on October 27, 2011
  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?

    asked on March 28, 2011
  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

    asked on March 28, 2011
  39. algebra

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

    asked on March 26, 2013
  40. algebra

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

    asked on August 22, 2012
  41. physics

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

    asked on July 11, 2012
  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)

    asked on February 16, 2011
  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

    asked on June 19, 2010
  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

    asked on December 3, 2006
  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

    asked on November 20, 2013
  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

    asked on October 22, 2012
  47. math

    2-|2x-5|=0 explain

    asked on October 3, 2012
  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

    asked on October 27, 2011
  49. Math

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

    asked on July 14, 2011
  50. math

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

    asked on April 3, 2011
  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 =

    asked on October 7, 2009
  52. Physics

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

    asked on August 20, 2015
  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?

    asked on February 8, 2013
  54. math

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

    asked on February 2, 2013
  55. comparing fractions

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

    asked on December 11, 2012
  56. math

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

    asked on November 29, 2012
  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

    asked on November 8, 2012
  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?

    asked on October 16, 2012
  59. statistics

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

    asked on February 4, 2012
  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)

    asked on February 16, 2011
  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

    asked on April 12, 2010
  62. 5th grade

    how many 2/3s are in 6?

    asked on February 8, 2010
  63. Math

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

    asked on October 7, 2009
  64. chemistry

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

    asked on September 5, 2008
  65. Science

    An aluminium cube measures 10 cm on each side. The density of aluminium is 2.7g/cm–³. What is the cube's mass? I need help regarding the formula.

    asked on June 11, 2017
  66. Physics

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

    asked on February 5, 2016
  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

    asked on June 18, 2014
  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?

    asked on June 18, 2014
  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

    asked on September 6, 2013
  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?

    asked on February 8, 2013
  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?

    asked on February 8, 2013
  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?

    asked on February 8, 2013
  73. math

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

    asked on February 2, 2013
  74. Math

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

    asked on February 2, 2013
  75. history

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

    asked on November 8, 2012
  76. english

    what is the definition of motivation from literature

    asked on November 5, 2012
  77. math

    4(3) exponent is 2

    asked on October 22, 2012
  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

    asked on October 22, 2012
  79. math

    3x squared x=4

    asked on October 20, 2012
  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

    asked on October 18, 2012
  81. math

    square root of -64

    asked on October 13, 2012
  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

    asked on October 11, 2012
  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

    asked on October 11, 2012
  84. algebra

    -1/2m > -7

    asked on October 10, 2012
  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?

    asked on October 7, 2012
  86. math

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

    asked on September 29, 2012
  87. math

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

    asked on September 20, 2012
  88. algebra

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

    asked on August 22, 2012
  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

    asked on August 22, 2012
  90. math

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

    asked on May 8, 2012
  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

    asked on March 20, 2012
  92. Algebra

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

    asked on November 5, 2009
  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

    asked on October 26, 2009
  94. math

    x+5=-3

    asked on February 12, 2009
  95. math

    32.1=a-21.8

    asked on February 10, 2009
  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

    asked on October 10, 2006
  1. Physics

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

    posted on May 24, 2018
  2. chemistry this is confusing to me please help

    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