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December 18, 2014

December 18, 2014

Posted by **Dewayne** on Saturday, March 23, 2013 at 10:12pm.

What I have so far...

radius =r

keight =h

V=πr²h

125/πr²=h

SA = πr² + 2πr(h)

= πr² + 2πr(125/πr²)

SA =πr² +250/r

- Calculus -
**Steve**, Saturday, March 23, 2013 at 11:18pmso far so good:

A = pi r^2 + 250/r

dA/dr = 2pi r - 250/r^2

so, when is dA/dr = 0?

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