4.5 hours
From 8:30 AM to 4:15 PM, there are 7 hours and 45 minutes. This can be calculated by counting the hours from 8:30 AM to 4:00 PM (which is 7 hours) and then adding the additional 15 minutes.
NO
If they're both on the same date, then they mark a period of 21/2 hours.
From 5:30 AM to 4:00 PM is a total of 10 hours and 30 minutes. This can be calculated by counting the hours from 5:30 AM to 4:00 PM. Specifically, that's 10 hours from 5:30 AM to 3:30 PM, plus an additional 30 minutes to reach 4:00 PM.
4.5 hours
From 8:30 AM to 4:15 PM, there are 7 hours and 45 minutes. This can be calculated by counting the hours from 8:30 AM to 4:00 PM (which is 7 hours) and then adding the additional 15 minutes.
NO
If they're both on the same date, then they mark a period of 21/2 hours.
Four pm means 4 o'clock in the afternoon. 10:15 pm means a quarter past ten in the evening. So, there are 6 hours and 15 minutes in between.
From 5:30 AM to 4:00 PM is a total of 10 hours and 30 minutes. This can be calculated by counting the hours from 5:30 AM to 4:00 PM. Specifically, that's 10 hours from 5:30 AM to 3:30 PM, plus an additional 30 minutes to reach 4:00 PM.
From 7:45 AM to 4:00 PM is a total of 8 hours and 15 minutes. To break it down, there are 8 hours from 7:45 AM to 3:45 PM, plus an additional 15 minutes from 3:45 PM to 4:00 PM. Therefore, the total duration is 8 hours and 15 minutes.
12 hours
12 hours
12 Hours ! There are 12 hours in the AM and 12 hours in the PM !
The best way of answering this sort of question is to use a 24 hour clock as this allows simple subtraction. 6.30 pm in a 24 hour clock is 12.00 (mid day) + 6.30 = 18.30 18.30 - 08.30 = 10
From midnight (am) to Noon (pm) is 12 hours.