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January 28, 2015

January 28, 2015

Posted by **Cassie** on Monday, March 23, 2009 at 6:41pm.

Thank you!

- Algebra -
**Reiny**, Monday, March 23, 2009 at 7:16pmA/C = pi(r^2)/(2pi r)

= r/2

if radius is quadrulpled

A = pi(4r)^2 = 16pi(r^2)

C = 2pi(4r) = 8pi r

ratio A/C = 16pi r^2/(8pi r) = 2r

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