Find the mass of a metal rod that is 2 ft long (starting at x = 0) and has a density function of e^(2x) lb/ft. Round your answer to two decimal places, if necessary. Your Answer: Answer Question 21 (4 points) Find the work required to pump all the water out of a cylinder that has a circular base of radius 4 feet and height 4 feet. Use the fact that the density of water is 62.4 lb/fts. Round your answer to two decimal places, if necessary