2 to mile marker 4. a. How long did it take Frank to run from mile marker 1 to mile marker 4? b. What was Frank's average speed as he ran from mile marker 1 to mile marker 4? c. 68 minutes after starting the race, Frank passed mike marker 9. To compete the race in 113 minutes, what must Frank's average speed be as he travels from mile marker 9 to the finish line?
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