Problem 7. (1 point) Problem 9. (1 point) A tank in the shape of an inverted right circular cone has height 4 meters and radius 2 meters. It is filled with 2 meters of hot choco- The tank shown below is full of water. Using the fact that the late. Find the work required to empty the tank by pumping the hot weight of water is 62.5 /b/fr, find the work (in ft-lbs) required chocolate over the top of the tank. The density of hot chocolate is to pump the water out of the outlet. Make sure your answer is 8 = 1040 kg/m'. Your answer must include the correct units. correct to within ten ft-lbs. Work = Answer(s) submitted: hemisphere (incorrect) Problem 8. (1 point) Work = ft-lbs A trough is 2 feet long and 1 foot high. The vertical cross-section Answer(s) submitted: of the trough parallel to an end is shaped like the graph of y = x4 from x = -1 to x = 1 . The trough is full of water. Find the (incorrect) amount of work in foot-pounds required to empty the trough by pumping the water over the top. Note: The weight of water is 62 pounds per cubic foot. Answer(s) submitted: (incorrect)