Posted by Anonymous on .
A rectangular box is to have a square base and a volume of 50 ft3. The material for the base costs 42¢/ft2, the material for the sides costs 10¢/ft2, and the material for the top costs 24¢/ft2. Letting x denote the length of one side of the base, find a function in the variable x giving the cost (in dollars) of constructing the box.

math (incomplete) 
PsyDAG,
Since it is rectangular rather than a cube, we have no indication how the other side or the height relate to x.