Aprism has a volume of 512 cubic feet. the width of the prism is 8 feet. could this prism be a cube? why or why not?

If it is a cube, then all side Lengths will be 8 ft, so the volume of that cube will be 8^3 or 8×8×8 = 512 ft^3

So, yes it can be a cube.

On monday,mrs.wise bought 3 lbs of apples at $4per lb= 4*3=$12on tuesday ,20%off and she buy 5 lbs of apples = $4-20%=3.20*5lb=$16example: other wise when she buy 5lbs on monday she have to spend 4*5=20