a hardware store rents vacuum cleaners that customers may use for part or all of a day, up to 12 hours, before returning. the store charges a flat fee plus an hourly rate. write a linear function f for the total rental cost of a vacuum cleaner.

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