A glider begins its flight 1 1/2 miles above the ground. After 60 minutes it is at 1 mile above ground a glider begins its fligh
t 1 1/2 miles above the ground. After 60 minutes, it is 1 mile above the ground. Find the change in height of the glider. If it continues to descend at the rate, how long does the entire descent last until the glider reaches the ground?
