18.5 hours
71/2 hours IF they're both in the same day.
8 hours.
7 hours
2hrs and 30mins
1.5 hours.
9 + 24k where k is an integer.
7 hours and 30 minutes.
7 and a half
4 hours and 15 minutes.
(20.75 - 9.5) hrs = 11.25 hrs = 11 hrs and 15 min
The military normally use the 24 hour clock, so 9:30am would be 0900 hours.
between 9 30 and 1130 would be 120 minutes so subtract 18 (1130-112) or 120-18= 102 minutes between 1254 and 236...1254 to 1 is 6 minutes then 60 to get to 2 then 36 more to 236pm so 6+60+36 or 102 minutes both are 102 minutes