(Answered) You are driving a car traveling at exactly 60miles per hour

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You are driving a car traveling at exactly 60miles per hour on a straight road. Suddenly a deer runs in front of the road. When your speed is exactly 30 feet per second, the deer sees your car and runs away, so you take your foot off of the brakes. The change in speed took 1.5 seconds. What is he acceleration?

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