Refer to Multiple-Concept Example 5 to review a method by which this problem can be solved. You are driving your car, and the traffic light ahead turns red. You apply the brakes for 3.00 s, and the velocity of the car decreases to +4.50 m/s. The car's deceleration has a magnitude of 2.70 m/s2 during this time. What is the car's displacement?