Differentials word problem help

• September 24th 2009, 08:04 PM
Baginoman
Differentials word problem help
Hey guys, cant seem to build up the formula for this question. Trying to evaluate dy and delta y for the indicated values...

A cube with sides 10inches long is covered with a coat of fiberglass 0.2 inch thick. Use differentials to estimate the volume of the fiberglass shell.

(Wink)
• September 24th 2009, 09:20 PM
The Power
My guess would be using the volume formula and the upper limit is 10.02 and lower limit is 10 would to be find the antiderivative for the formula and plug in the new limits and such and F(b) - F(a), sorry for not being so clear

Something like this I assume since the volume formula of a cube is

$a^3$

$\int a^3$

$\frac{a^4}{4}$
• September 27th 2009, 10:15 PM
Baginoman
We haven't gotten into integrals yet. So im assuming there's another way?