February 26, 2017

Homework Help: calculus

Posted by Yoona on Sunday, December 18, 2011 at 11:28pm.

1. A sheet of cardboard 3 ft. by 4 ft. will be made into a box by cutting equal-sized squares from each corner and folding up the four edges. What will be the dimensions of the box with largest volume?

so I did V=lhw
and found l=4-2h and w=3-2h
I also distributed them in the equation
I found V= and found the derivative
v'=12-28h+12h^2 and I set it equal to zero
from there...I don't know whay to do.

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