From 8:30 AM to 7:30 PM is a total of 11 hours. You can calculate this by counting the hours from 8:30 AM to 12:00 PM (3.5 hours) and then from 12:00 PM to 7:30 PM (7.5 hours), which adds up to 11 hours.
6 hours.
7.5 hours
7.5 hours
7
6
It is five hours.
Ten hours.
8 hours.
13.5
4 hours and 35 minutes.
8 hours and 55 minutes.
10 hours and 45 minutes.