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January 26, 2015

January 26, 2015

Posted by **Chris** on Wednesday, April 20, 2011 at 5:31pm.

- Calculus -
**Damon**, Wednesday, April 20, 2011 at 7:28pmVolume = V = (4/3) pi r^3

area =A = 4 pi r^2

r = (A/4pi)^.5

so

V = (4/3) pi (A/4pi)^1.5

dV/dt = (4/3)(1/5)(A/4pi)^.5 (dA/dt/4pi)

here dV/dt = -2

r = 12 so A = 4 pi(144)

solve for dA/dt

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