Choose the one alternative that best completes the statement or answers the question. -A bicyclist starts a timed race at 6.0 mi/h. In order to win, he must average 21 mi/h.

Choose the one alternative that best completes the statement or answers the question.
-A bicyclist starts a timed race at 6.0 mi/h. In order to win, he must average 21 mi/h. Assuming constant acceleration from the start, how fast must he be traveling at the end of the race?
A) 36 mi/h
B) 42 mi/h
C) 30 mi/h
D) 24 mi/h

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