If gravel must be distributed across an area that measures 17 feet square and the gravel layers is to be 6 inches thick the volume of the gravel needed would be

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