Friday
July 25, 2014

Posts by JR


Total # Posts: 116

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?

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 children? Why

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?

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!

mth
five pentagonal numbers that follow 22

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 this demonstrate?

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 pulley system. Mass o...

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

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?

science
2.77^-4 meters/second

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

Teacher Aide
Is that your answer DrBob222? Really!!

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

math
oh 3 feet

math
1 foot

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?

math
thank you

math
1/4

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?

math
2 8/12 + 7 9/12 = 9 17/12 that's where I get confused not sure how to break it down from here

math
6 28/20 - 2 15/20= 4 13 /20?

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?

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?

math
Thank you Barb

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

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

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

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

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

trig
You lean a ladder 6.7 m long against a wall. It makes an angle of 63 degrees with the level ground. How high up is the top of the ladder?

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

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

english
what is the definition of motivation from literature

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 accurate within $200 ...

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

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

math
4(3) exponent is 2

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

math
4(3) exponent is 2

math
3x squared x=4

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

Math 6
percent/100=13/20 multiply 13 and 100 then divide by 20

Math
The way you solve this problem is percent over whole and is over of 60%/100=250/x Cross multiply 100x250 the answer of that divide by 60 tell me if u need further help

Math
The way you solve this problem is percent over whole and is over of 60%/100=250/x Cross multiply 100x250 the answer of that divide by 60 tell me if u need further help

math
How do u know wat way direction to put the inequality

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?

math
square root of -64

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

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

algebra
-1/2m > -7

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?

math
2-|2x-5|=0 explain

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

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

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

Intermediate Algebra
im actually not sure on any of it. And when i tried to rework the problem to see how u got ur answer like y=13. Am i suppose to combine all the terms and then do the math?

algebra
Would the answer here be 8x^2+4x?

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

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

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 please

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?

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

algebra 1
hey jimmy was that all you got i seen 5 years old say better things then that

algebra 1
what is the degree of the trinomial? a3+7ab-8b4

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

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 a power ball, and a s...

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

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 than one f...

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

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

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

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 di...

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, hits floor and returns north velocity at 1 m/s

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, hits floor and returns north velocity at 1 m/s

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

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

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?

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 be its kinetic energy ...

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, one arm swe...

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 = 0.140 m, and is att...

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 kinetic energy of ...

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)

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)

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?

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 = ...

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 relative to the ground? ...

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

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

5th grade
how many 2/3s are in 6?

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

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 seconds (t). How man...

English MLA Format
Accessible parking.(Santa Rosa Junior College)(Brief article)." American School & University 81.2 (2008). Academic OneFile. Web. 28 Oct. 2009.

Math
Thank you Ms. Sue, you really helped me out!

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

Math
Thanks, that really helps me out!

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 =

math
x+5=-3

arithmetic
the answer is 5 amanda

math
53.9

math
53.9

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