7 and a half
9 to 5 is 8 hours. If you subtract the lunch break, you get 7 hours, 30 minutes.
72 hours
48 hours.
From 6am to 5pm is 11 hours.
11am to 12 is 1 hour 12 to 5pm is 5 hours → 11am to 5pm is 1 + 5 = 6 hours
48
13 hours
2 hours
8.5 hours
9 hours.
It is 3 hours