Two answers, depending on whether am or pm times
Examples:
6:30am to 2pm = 7:30 hours
6:30pm to 2pm = 19:30 hours
and so on ...
(11.5 + 24k) hours where k is an integer. 11 and 1/2 hours.
(7+12k) hours where k is an integer.
(11+24k) hours where k is an integer.
10.5 hours
315
7 and a half hours
8 1/2 hours, if the times are on the same day.
(11.5 + 24k) hours where k is an integer. 11 and 1/2 hours.
9 hours.
9 hours.
3
3 pm is 15 hours, so 15-3 1/2 = 11 1/2 hours or 11:30 hours
If they're both on the same date, then they mark a period of 21/2 hours.
10.5 hours
There are 9 hours between 630 am and 930 am.
8.5
8.5 hrs