A juggler throws a bowling pin straight up with an initial speed of 7.60 m/s . (A) How much time elapses until the bowling pin returns to the juggler's hand?

Apyramid fits exactly inside a cube. the cube and the pyramid share the same square base, and they are both exactly the same height. the volume of the cube is 66 cubic inches. what is the volume of the pyramid? explain your answer. answer asap