6 and 1/2
15 hours.
5-1/2
438
There are 21.5 + 24k hours, where k is an integer.
From 8:30 AM to 4:30 PM is a total of 8 hours. Subtracting the 40-minute lunch break, the total working time is 7 hours and 20 minutes.
3 hours.
15 hours.
8 hours.
8.5 hours
This would be 6.5 hours.
5-1/2
6.5 hours (6 hours 30 minutes) between 10am and 4:30pm
438
There are 21.5 + 24k hours, where k is an integer.
From 8:30 AM to 4:30 PM is a total of 8 hours. Subtracting the 40-minute lunch break, the total working time is 7 hours and 20 minutes.
There are 14 hours between 4:30 PM and 6:30 AM. To break it down, from 4:30 PM to midnight is 7.5 hours, and from midnight to 6:30 AM is an additional 6 hours. Adding those together gives you 7.5 + 6 = 13.5 hours.
Afternoon.