24 hours
48 hours.
15
It's 120 hours between 6pm Thursday until the following Tuesday at 6pm
From 8:15am to 6pm is 9 hours and 45 minutes.
72 hrs
It is 18 hours from 10AM to 4AM. You can figure this out in a few different ways. 10AM to 10AM is 24 hours and 4AM is 6 hours before 10AM. 24-6=18 10AM to noon is 2 hours. Noon to midnight is 12 hours. Midnight to 4AM is 4 hours. 2+12+4=18
72 hours before it is 4am on Friday morning. 72 hours after it is 4am on Thursday morning.
13 hours
11 hours
9 hours
9 hours