fourteen and a half hours
4:00 + 10:30 = 14:30
as 12 - 8 = 4 then 12 to 10:30 is 10:30
8 hours and 30 minutes.
13 hours and 15 minutes.
6 hours and 30 minutes.
6 hours 30 minutes
It is 3 and a half hours
From 12 PM to 10:30 PM is a duration of 10 hours and 30 minutes. This can be calculated by counting the hours from 12 PM to 10 PM (which is 10 hours) and then adding the additional 30 minutes.
two and a half 1:30 + 1:00 = 2:30
It 9 hours and 30 minutes.
11 hours. From 8 am to 8 pm would be 12 hours, and 7 pm is 1 hour less than that.
(8.5+24k) hours where k is an integer.
13 and 1/2 hours
4 and 1/4