21. Tim ran a quarter mile five × yesterday. The table above shows the time of each run, in minutes and seconds. For example, the time 1:07 represents 1 minute and 7 seconds. What is the range, in seconds, of the × of Tim's five runs?
Answer: C
The range of Tim's five runs is 8 seconds.
The range is calculated by subtracting the shortest run time from the longest run time. In this case, the difference between the maximum and minimum times of Tim's five runs amounts to 8 seconds.
A) 4
Option A is incorrect because a range of 4 seconds would imply that the longest and shortest times are only 4 seconds apart. This does not align with the calculated difference between the maximum and minimum run times.
B) 6
Option B is also incorrect as a range of 6 seconds suggests that the longest and shortest run times differ by 6 seconds. This does not reflect the actual time difference observed in Tim's runs.
C) 8
Option C is correct since the calculation of the range involves finding the difference between the longest and shortest times. This difference, which is 8 seconds, accurately represents the range of Tim's five runs.
D) 11
Option D is incorrect because a range of 11 seconds would indicate an even larger difference between the longest and shortest times. The time data does not support such a discrepancy, as the actual range calculated is only 8 seconds.
Conclusion
The correct answer is 8 seconds, as this accurately reflects the range calculated from Tim's run times. All other options fail to represent the true difference in time, demonstrating a misunderstanding of how to calculate the range based on the given data.