You are here:

Advertisement

Hello,

I am currently working with circles and their surface area and volumes.I know the diameter of one circle, and the radius of the other,but from that information I am not sure how to find the scale factor.What steps do I need to take to get there?Thank you!

-Karlee

volume v = (4/3)πr³

surface area a = 4πr²

"I know the diameter of one circle, and the radius of the other"

r₁ = d₁/2

I'm not sure what you are looking for—the ratios of the volume and areas of the spheres?

v₁/v₂ = r₁³/r₂³ = (r₁/r₂)³

a₁/a₂ = r₁²/r₂² = (r₁/r₂)²

Advanced Math

Answers by Expert:

I can answer questions in Algebra, Basic Math, Calculus, Differential Equations, Geometry, Number Theory, and Word Problems. I would not feel comfortable answering questions in Probability and Statistics or Topology because I have not studied these in depth.

I tutor students (fifth through twelfth grades) and am a Top Contributor on Yahoo!Answers with over 24,000 math solutions.**Publications**

Co-author of An Outline of Scientific Writing: For Researchers With English as a Foreign Language**Education/Credentials**

I have a Bachelor's degree in Applied Mathematics from the University of California at Berkeley.**Past/Present Clients**

George White Elementary School.
Homework Help program at the Ridgewood Public Library, Ridgewood, NJ.
Individual students.