Stephanie ran the Boston marathon in 2014. She finished in 3 hours 51 minute and

Question

Stephanie ran the Boston marathon in 2014. She finished in 3 hours 51 minute and 26 seconds. a. Which of the following variable definitions is appropriate for representing Stephanie's varying distance from the start of the race? m represents number of miles m represents the number of miles Stephanie has run since the start of the race m represents the distance Stephanie ran m represents distance b. Which of the following situations could represent m = 8, assuming your definition of m in part (a)? Select all that apply. Stephanie has run 8 miles since the half way point of the race Stephanie has run 8 miles since she stopped for water Stephanie is 8 miles from the starting line Stephanie is 8 miles from the finish line None of the above c. Which of the following situations could represent Am = 16, assuming your definition of m in part

Explanation / Answer

Ans: a) option b is the appropriate definition of the variable as it defines the attribute, its unit and a reference point for measuring.

b) if it's a one way one direction race then option (c) is correct as the distance ran from the start of the race will be equal to distance from start line but if the track is curved then the distance and displacement will be different and option (e) will be correct.

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