8 hours.
Nine and a half hours.
840
Nine hours.
4.5 hours
3am to 2pm is 11 hours.
ten and a half
There are 7 hours between 7 am to 2pm
3am to 2pm is 11 hours.
8:30am to noon is 3.5 hours.
It is (8.5 + 24k) hours where k is an integer.
7am to 2pm is 7 hour.