Solve.Open-Top Box Joan intends to make an 18-in.3 open-top box out of a 6 in. by 7 in. pi...

Solve.

Open-Top Box Joan intends to make an 18-in.3 open-top box out of a 6 in. by 7 in. piece of copper by cutting equal squares (x in. by x in.) from the comers and folding up the sides. Write the difference between the intended volume and the actual volume as a function of x. For what value of x is there no difference between the intended volume and the actual volume?