The time from 7:30 AM to 5:00 PM is 9 hours and 30 minutes. To break it down, from 7:30 AM to 5:00 PM is 9 hours, plus an additional 30 minutes. Thus, the total duration is 9.5 hours.
15 hours.
10 hours and 15 minutes.
2 hours and 30 minutes.
1075
That's nine and one quarter hours.
It is (8.5 + 24k) hours where k is an integer.
It is 8 hours and 38 minutes.
6 and 1/2 hours
6 hours 50 minutes
8 hours 30 minutes.
It 21 hours
9.5