I’m pretty sure the answer is -10
It would be helpful if the picture showed the entire question
10 mins = 1 miles
1 hour = 1 x 6 = 6 miles
8 hours = 6 x 8 = 48miles
The jogger could cover 48 miles a day.
3987 ÷ 48 = 83.06 days
It takes 83.06 days to jog the length of this frontier.
83.06 days ÷ 7 = 11.87 weeks = 12 weeks (round to the nearest whole number)
It takes 12 weeks to jog the length of this frontier.
