Stacking baseballs. If a stack of baseballs (similar to the one shown Excercise) has a rec...

Stacking baseballs. If a stack of baseballs (similar to the one shown Excercise) has a rectangular base that is sixballs long and four balls wide, and is stacked with as many balls as possible, how many balls will be in the stack? Explain your reasoning. We can only place a ball on the stack if it is resting on four other balls.

Excercise: In preparation for his induction into the baseball hall of fame, Cal Ripken, Jr. autographed a stack of baseballs to give away to his fans. How many baseballs are in the stack?