What was your original speed in miles per hour? The light turns red, and you come to a screeching halt. Checking your stopwatch, you see that you stopped in 4.5 seconds. Your deceleration was 1.23 x 10^-3 miles per second squared.
A. 21.6 miles/hour B. 0.006 miles/hour C. 0.36 miles/hour D. 0.0001 miles/hour