Where is the picture? If you could add your picture I’d be glad to help you!! :)
7^0=1
7^1=7
7^2=7*7=49
7^3=7*7*7=343
etc... etc...
It takes him 35 + 4 = 39 total minutes one way, so it would take him 39 x 2 = 78 minutes for 1 round trip.
convert 5 hours and 12 minutes into minutes: 1 hour = 60 minutes.
5 hours x 60 minutes = 300 minutes.
300 + 12 = 312 total minutes for the week.
Divide total minutes by minutes per round trip:
312 / 78 = 4 round trips total