Jr
Most popular questions and responses by Jr
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 
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 
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 
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 
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 
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 
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 
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 
Statistics
When a distribution is moundshaped symmetrical, what is the general relationship among the values of the mean, median, and mode?
asked on February 3, 2012 
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 
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 
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 
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 
physics
A 200mwide 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 
algebra 1
what is the degree of the trinomial? a3+7ab8b4
asked on May 14, 2012 
Math
how can i solve 10x+y=4?? i think it is impossible with one answer
asked on April 20, 2019 
mth
five pentagonal numbers that follow 22
asked on January 14, 2014 
chemistry
If the Kelvin temperature of 2 L of a gas at STP doubles, the new volume would be
asked on September 5, 2008 
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 
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 
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 143 and the power ball number 160.There are three different lottery games, a three number game, a five number game with
asked on April 7, 2012 
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 
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 
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 
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 
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 
math
A 1000·kg car traveling with a velocity of 13·m/s north collides headon 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 
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 
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 
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 $3.00 per lb.express the probrlem as a system of linear equations and
asked on December 8, 2008 
Algebra 1
Hudson is already 40 miles away form home on his drive back to college. He is driving 65 mi/h. Write an equation that models the total distance d traveled after h hours.
asked on November 17, 2015 
physics
An 82 kg man lowers himself to the ground from a height of 6.6 m by holding onto a rope that runs over a frictionless pulley to a 66 kg sandbag. With what speed does the man hit the ground if he started from rest?
asked on January 26, 2011 
chemistry
Why do gases deviate from ideal behavior at very high pressures
asked on September 5, 2008 
Physics
calculate the acceleration of this system, assuming that there are no frictional forces between the table and Block A. Block A is sitting on a table connected by a rope to a pulley system and Block B is hanging off the table connected to the rope from the
asked on November 19, 2013 
MATH
for 30 days on the 1st daY I GET A PENNY THAN ON IT DUOBLES EVERY DAY UNTIL DAY 30 HOW MUCH PENNIES DO I HAVE ON DAY30
asked on October 29, 2012 
MATH
Suppose the mass of ball F is 0.5·kg. What is the impulse delivered to the ball by the floor? Ball going south at velocity 4 m/!@#$%^&s floor and returns north velocity at 1 m/s
asked on October 27, 2011 
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 
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 
algebra
is 5x + 2y = 8 look like horizontal, vertical, slanted right upwards,slanted right downwards?
asked on March 26, 2013 
algebra
use polynomial long division to divide 4x^3+6x^2+16x10 by x^22x5 help me please
asked on August 22, 2012 
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 
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 
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 
economic systems
what are the three spinoff 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 
Physics
An astronaut is at rest 1.0 m away from his shuttle when his jet malfunctions and his handheld 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 
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 
math
22x5=0 explain
asked on October 3, 2012 
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 
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 
math
find the vertex, the line of symmetry, the max or min value of f(x)=2x^28x+16
asked on April 3, 2011 
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 
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 
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 
math
7 2/5  2 3/4 = I need to show how I got the answer
asked on February 2, 2013 
comparing fractions
15/16 greater,less than or equal to 3/8
asked on December 11, 2012 
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 
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 
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 
statistics
What are the values of the mean and standard deviation of a standard normal distribution? μ = σ =
asked on February 4, 2012 
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 
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 
5th grade
how many 2/3s are in 6?
asked on February 8, 2010 
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 
chemistry
f the pressure of 2 L of a gas at STP doubles, the new volume would be
asked on September 5, 2008 
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.
asked on June 11, 2017 
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 
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 
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 
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 
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 
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 
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 
math
4 5/8 + 9 3/5 = rename or simplify as needed
asked on February 2, 2013 
Math
rename or simplify as needed 11 1/4  5 8/9
asked on February 2, 2013 
history
the number of persons needed at a meeting in order for business to place is called
asked on November 8, 2012 
english
what is the definition of motivation from literature
asked on November 5, 2012 
math
4(3) exponent is 2
asked on October 22, 2012 
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 
math
3x squared x=4
asked on October 20, 2012 
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 
math
square root of 64
asked on October 13, 2012 
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+77=52 5n=45 5n/5=45/9 n=9
asked on October 11, 2012 
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+77=52 5n=45 5n/5=45/9 n=9
asked on October 11, 2012 
algebra
1/2m > 7
asked on October 10, 2012 
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 
math
5(T3)= 1+2(T3)
asked on September 29, 2012 
math
h7= 13 explain on how to the variable while theirs a negative in front of it
asked on September 20, 2012 
algebra
multiply (x1)(4x^22x+2)
asked on August 22, 2012 
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 
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 
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 
Algebra
Solve the quadratic equation. x^2 – x = 56
asked on November 5, 2009 
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 
math
x+5=3
asked on February 12, 2009 
math
32.1=a21.8
asked on February 10, 2009 
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

Physics
Along the surface of the hill, toward the top of the hill
posted on May 24, 2018 
chemistry this is confusing to me please help
1. heart rate temperature weight
posted on June 21, 2017 
math
jbjj
posted on February 22, 2016 
math
Didn't help
posted on April 21, 2015