The cost of peanuts varies directly with the number of pounds bought. If 5 pounds cost $7.50, find the cost of 3 pounds.

Prism m and pyramid n have the same base area and the same height. cylinder p and prism q have the same height and the same base perimeter. cone z has the same base area as cylinder y, but its height is three times the height of cylinder y. the figures and have the same volume.