February 20, 2017

Homework Help: PreCalculus

Posted by Samantha on Monday, October 6, 2008 at 10:19pm.

I'm so confused... I've always been good at math but this year I'm just not getting it. But I know i can I always get help and a REAL explanation from the people on here so...

A steel drum in the shape of a right circular cylinder required to have a volume of 100 cubic feet.
(a) Express the amount A of material required to the make the drum as a function of the radius "r" to the cylinder.
(b) How much material is required if the drum is of radius 3 feet?
(c) Of radius 4 feet?
(d) Of radius 5 feet?

I'm so confused, I don't even know where to start!!!

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