To calculate how many hours are between 6:45 and 9:00 AM, first convert 6:45 to a 24-hour format, which is 06:45. The time difference between 06:45 and 09:00 is 2 hours and 15 minutes. Therefore, there are 2 hours and 15 minutes between 6:45 and 9:00 AM.
12 hours.
From 9am to 6:30pm is 9 hours and 30 minutes.
21
21 hours
6 hours
5 Hours
There are zero hours between 9 am and 9 am.
11 hours
4 hours. 9am until noon is 3 hours and 1 more makes 4.
5.7
Twelve hours
21