8 hours
9 * * * * * Actually, it is 8 hours.
13 hours. 8 pm to 12 am (midnight) is 4 hours. 12 am (midnight) to 9 am is 9 hours. 4 + 9 = 13 -- 13 hours of sleep (if you fall asleep exactly at 8 pm and awaken exactly at 9 am, have not awoken in your sleep, and have not changed timezones)
There are (24k + 9) hours where k is an integer.
-506
8 hours
It is a hole 12 hours.
8 hours.
9 * * * * * Actually, it is 8 hours.
8 hours and 30 minutes.
8:45 AM - 5:45 PM 9 hours have passed.
13 hours. 8 pm to 12 am (midnight) is 4 hours. 12 am (midnight) to 9 am is 9 hours. 4 + 9 = 13 -- 13 hours of sleep (if you fall asleep exactly at 8 pm and awaken exactly at 9 am, have not awoken in your sleep, and have not changed timezones)
There are (24k + 9) hours where k is an integer.
9 hours and 30 minutes.
-506
8 hours and 40 minutes -- or 8 2/3 hours to be exact. How do I know? 9 am to 12 pm (noon) is 3 hours. 12 pm (noon) to 5 : 40 pm is 5 hours and 40 minutes, or 5 2/3 hours. 3 + 5 2/3 = 8 2/3
There are 5 hours between 4 pm and 9 pm