Math Help

Archive for April, 2006

Question: help…mad hard math question…3 college students to figure it out?

100 people went to the movies. It costs $100 to get in. Men pay $10, women pay $3 and children pay $0.50. How many women, children and men went?
i dont need help…i understand the problem…but thanks
oh wait nevermind i got it lol…wow…i shoulda though harder lol
no…100 people have to go to the movies….and the total of the money has to be 100 dollars even….but 100 People have to go to the movies…

Answer: M+W+C = 100
10M + 3W + 0.5*C = 100
Eliminating C

19M + 5W = 100
Clearly M must be a multiple of 5.
If M = 5, W = 1, C = 94
This works

If M = 0, W = 20, C = 80
This also works

You have two solutions.
Funny that in your picture you’re holding up two fingers.

Rep. Chu Presents Amendment to Help Students Earn Math, Science and Engineering Degrees

Question: Two planes leave Los Angeles at the same time. One heads south to San Diego; the other heads north to San Fran

Francisco. The San Fransico plane flies 50 mph faster. In 1/2 hr. the planes are 275 mi apart. What are their speeds?

Answer: You are on the right track, but remember we are ADDING the distances to get 275 because the problem states the two planes are 275 miles apart…

so it would be:
25 + 1/2x + 1/2x = 275
25 + x = 275
x = 250

So the plane going to San Jose was flying at 250 MPH and the plane flying to San Francisco was flying at 300 MPH.

Hope this helps! Best of luck

Mathematics?

How to find the volume of a sphere? The formula for volume of a sphere will help you calculate the volume of a sphere. The volume of a sphere formula is given below. In calculating the volume of a sphere, we measure the radius of the sphere. The radius of a sphere is the distance between the center of the sphere and the surface of the sphere. No matter where you measure the radius of the sphere the distance between the center point of the sphere and any point on the surface of the sphere is the same. In the volume of a sphere calculation, we again use the mathematical entity ‘pi’. Using the formula for the volume of a sphere, finding the volume of a sphere is easy and fun.

What is the formula for the volume of a sphere?

Below is the formula for the volume of a sphere. It is sometimes called the volume of a sphere equation. In calculus, proof for the volume of a sphere is also not difficult to do and the calculus proof for the volume of a sphere will be discussed in other section of this website. Below is the volume of a sphere formula.

Examples of how to find the volume of a sphere:

1. What is the volume of a 3 inch sphere?
   • The volume of a sphere with radius of 3 inches is: 4 x 3.14159265 x 3 x 3 = 36 x 3.14159265 or 36
2. If you double the radius of a sphere, is the volume affected?

If you double the radius of a sphere then your new radius is effectively 2r. That means the new volume of the sphere is:

= (4/3) x x (2r) ³

= (32/3) r ³