(Section 4.2) Jill began her 6.2-mile (10-km) race last Saturday determined to set a personal record. After running hard to improve her personal time, she was so exhausted that she collapsed right on the finish line to complete the race. She happily completed the race in 32 minutes. Explain how we know that she must have been running at exactly 11 miles per hour at least twice in the race
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(Section 4.2) Jill began her 6.2-mile (10-km) race last Saturday determined to set a personal record....