Question: A bank robber in a getaway car approaches an intersection at a speed of 45 mph. Just as he passes the intersection, he realizes

A bank robber in a getaway car approaches an intersection at a

A bank robber in a getaway car approaches an intersection at a speed of 45 mph. Just as he passes the intersection, he realizes that he needed to turn. So he steps on the brakes, comes to a complete stop, and then accelerates driving straight backward. He reaches a speed of 22.5 mph moving backward. Altogether his deceleration and re-acceleration in the opposite direction take 12.4 s. What is the average acceleration during this time?

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