# Automobile Deceleration Problem

Hey! I have this question that I can't find the answer to anywhere!

The Brakes of an automobile can decelerate at 6.00 m/s2. a) How many seconds are required to stop the automobile if it is traveling at a rate of 27.0 m/s? b) How many meters does the automobile travel during this deceleration? Can you help me please....I'm lost!

$$s=\frac{1}{2}at^2$$