r. a = 2, b = 4. s. A = 13°, c = 11. t. b = 40, c = 80. 2. The length of a path going ... A staircase is to rise 10 feet 8 inches in a horizontal distance of 13 feet 4 inches. ... From a balloon directly above a certain building, the angle of depression of a river ... Find the approximate height of the kite above level ground if 85 meters