February 19, 2017

Homework Help: algebra

Posted by Nancy on Monday, November 8, 2010 at 11:16pm.

Express the amount of material needed to make a can as a function of the radius. In other words, find a function A(r) such that A represents the surface area (in square inches) of the cylinder and r is the radius (in inches).

my answer (not sure)

A(r) = r^2 + 2r + 29 ?

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