Challenge An airplane is preparing to land at an airport it is 42,000 feet above the ground and is descending at the rate of 3,500 feet per minute. At the same airport, another airplane is taking
off and will ascend at the rate of 2,500 feet per minute When will the two airplanes be at the same astude and what will that altitude be? Use pencil and paper. Use two other methods to solve
the problem.