9 hours and 30 minutes.
5 hours and 30 minutes.
9.5
8
1 hour, 10 minutes
13 hours and 40 minutes.
3 hours and 30 minutes.
5 hours and 15 minutes.
1:30pm to 11:00pm is 9.5 hours.
4:30pm to 8pm is 3.5 hours or 3 hours 30 minutes.
(8.5+24k) hours where k is an integer.
Eight hours.