9 hours, 45 minutes
3 hours and 15 min
4 hours and 20 minutes.
7:45 am to 6:15 pm is 10 hours 15 minutes (101/4 hours)
1 hour and 45 minutes.
8 and 1/2
10 hrs
There are 35 minutes
Most school days are from eight am to three pm
31 and 1/2 hours
7:45am to 12:15pm = 4.5 hours (4 hours 30 minutes)
31 and 1/2 hours