Posted by **Anonymous** on Friday, September 18, 2009 at 3:32pm.

An athlete wants to complete the 4000 m run in 12.0 minutes. After exactly 10.0 minutes of running at a constant speed, she still has 800 m to go. If she then accelerates to 4.0 m/s^2, how much longer will it take her to complete the race?

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