There are 6 hours between 9:30 am and 3:30 pm. This can be calculated by subtracting the starting time from the ending time: 3:30 pm - 9:30 am = 6 hours. To further break it down, you can consider that there are 12 hours between 9:30 am and 9:30 pm, and half of that time has passed when it is 3:30 pm.
18½ hours
1260
71/2 hours IF they're both in the same day.
8 hours.
7 hours
1.5 hours.
18½ hours
It is 4 hours.
7 hours and 30 minutes.
2hrs and 30mins
9 hours and 30 minutes.
5 and a half