Posted by **Alicia** on Wednesday, November 24, 2010 at 12:09am.

C = 15*pi*(2*D*h+(3/4)*D²) + L* (94.25*D*h+35.34*D^2)/(pi*D^2*h/4)

first dC/dD?

second d^2C/dD^2?

first dC/dh?

second d^2C/dh^2

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