"Economite Plastics plans to produce a one-compartment vertical file by bending the long side of an 8-in by 14-in. sheet of plastic along two lines to form a U shape. How tall should the file be in order to maximize the volume that the file can hold?"
Can you guys help me determine what the constraints are for this particular problem with an explanation of why that is so? After I find that out, I can solve it.... thanks.