Answer: The number of miles is 21 miles that the team member jog.
Explanation:
Since we have given that
Average jogging rate off the cross country team = 6 miles per hour
Time taken by one member per weekend = 3.5 hours
We need to find the "Number of miles the team member jog":
As we know the formula for "Distance-Speed":

Number of miles of the team member is given by

Hence, the number of miles is 21 miles that the team member jog.