A large tank is designed with ends in the shape of the region between the curves y = x^2/2 and y = 15, measured in feet. Find the hydrostatic force on one end of the tank if it is filled to a depth of 9 ft with gasoline. (Assume that the density of the gasoline is 42.0 lb/ft3. ) 5,785 lb 4,850 lb 6,918 lb 2,683 lb 7,698 lb 3,855 lb