From 9 AM to 3:30 PM is a total of 6 hours and 30 minutes. This can be broken down into 6 hours from 9 AM to 3 PM, plus an additional 30 minutes to reach 3:30 PM.
18½ hours
18½ hours
It is 4 hours.
9 hours and 30 minutes.
5 and a half
7
12 hours.
Eight and one half hours.
From 9am to 6:30pm is 9 hours and 30 minutes.
21
5 Hours
21 hours