9am, 10am, 11am, 12pm, 1pm, 2pm, 3pm, 4pm, 5pm. 8 hours.
MON-FRI: 8am - 4pm / SAT - SUN: 10am - 3pm
12am to 4pm is 16 hours.
Oh, dude, let me grab my calculator... just kidding. So, from 3pm to 4pm, that's one hour. Then from 4pm to 7pm, that's three hours. And finally, from 7pm to 7:30pm, that's half an hour. Add them up, and you get 4.5 hours, which is like 270 minutes. Easy peasy!
6 hours from 4pm to 10pm
3PM Mountain Time is 4PM Central Time, so it would be 4PM in Chicago.
3pm to 10pm is 7 hours.
7am to 4pm is 9 hours.
4pm to midnight is 8 hours.
13
3PM
10am to 4pm is a period of six hours.