Jim likes to rock climb in his spare time. Recently, he climbed down from the top of a cliff to the bottom. At the top, where Jim started, he was 2500 ft above the ground. He moved down the cliff at a speed of 20 ft/min. a) Write an equation to represent the height h, in feet, that Jim was above the ground after t minutes. b) Make a table of values for Jim's height above the ground for values of t from 0 to 4. c) What was Jim's height above the ground after 40 minutes? d) How many minutes did it take to reach the ground?