Originally Posted by

**mike_302** So the question gives me enough information to make an box volume equation dependent on a single variable... good: I can do calc with this. But the question asks: Determine the domain of the equation for this question...

Given that the piece of cardboard that this "net" was cut out of for a box, the cardboard was 10cm x 15cm, and my equation for volume was made with x's (I am confident on my equation at this point.. So assume that is right. I am just talking theory here). So the question is.... is my domain for this equation equal to the derivative, on the intervals where the derivative is positive? Or is it equal to the domain of V(x) where V(x) is positive? I am unsure :S