A 16-foot ladder is resting against a wall when the bottom of the ladder begins to slip from the wall at a rate of 0.75 ft/s. Find the rate at which the top of the ladder is sliding down the wall when the bottom of the ladder is 12 ft away from the wall.

answers:

0.563 ft/s

0.75 ft/s

0.85 ft/s

1.176 ft/s