A car decelerates from 36 meters per second to 12 meters per second. The constant rate of deceleration is 12 meters per second per second. How long did it take for the car to decelerate?

Chameleons catch insects with their tongues, which they can rapidly extend to great lengths. in a typical strike, the chameleon's tongue accelerates at a remarkable 220 m/s2 for 20 ms, then travels at constant speed for another 30 ms.