From the top of a 170-ft lighthouse, the angle of depression to a ship in the ocean is 25°. How far is the ship from the base of the lighthouse? (Round your answer to the nearest foot.) Answer: 79 ft.
A 20-ft ladder leans against a building at an angle of 73° with the ground. How high does the ladder reach on the building? (Round your answer to the nearest foot.) Answer: 19 ft.
An airplane is flying at an elevation of 5150 ft, directly above a straight highway. Two motorists are driving cars on the highway, both on one side of the plane. If the angle of depression to one car is 37° and that to the other car is 55°, how far apart are the cars? (Round your answer to the nearest foot.) Answer: 1044 ft.