It is five hours.
830 930 1030 1130 1230 130 230 330 7 hours
10 and 1/2
945 pm to midnight is 2 hours, 15 minutes. Midnight to 830 am is 8 hours, 30 minutes. The total is 10 hours, 45 minutes.
6 hours.
7.5 hours
7 hours
Three hours
8.5 hours
3 hours.
8 hours 15mins.
7.5 hours