Question:

An open-top box is to be contructed from a piece of cardboard by cutting congruent squares from the corners and then folding up the sides.

I have already figured out the rest of the questions pertaining to.. except for the last part:

D) Using your function V= x(32-2x)(40-2x);

determine the values of "x" that will result in boxes with a volume greater than 2016 cm^3