If you are talking about from 12pm-4pm = 4 hours. If you are talking about from 12am-4pm = 16 hours.
6 hours from 4pm to 10pm
7am to 4pm is 9 hours.
15
7 hours
Hours are between 4pm and 9pm is 5 hours, 9 pm -4 pm
If you are talking about from 12pm-4pm = 4 hours. If you are talking about from 12am-4pm = 16 hours.
12am to 4pm is 16 hours.
8am to 4pm is 8 hours.
6 hours from 4pm to 10pm
4 + 24*n where n is an integer.
7am to 4pm is 9 hours.
seven 3 + 4 = 7 as 3 hours 9 to 12 then 4 hours 12 to 4 or in 24 hour clock 4pm is 16:00 so 16 - 9 = 7 hours
4pm to midnight is 8 hours.
10am to 4pm is a period of six hours.
15
7 hours