19 hours
The time from 8 o'clock to 12 o'clock is 4 hours. This is calculated by counting the hours: 9, 10, 11, and then reaching 12.
2 hours and 30 minutes.
67 hours
37 hours.
24 hours in a whole day and night 60 minutes in one hour, so 24x60 = 1,440 minutes.
3 assuming they are both the same-am or pm
That's military speak for 5 oclock in the morning
about 10 hours
24 hours.
24 hours.
8 to 10 hours
2 hours and 30 minutes.
4 hours
There are 4.9625 hours in one night on Jupiter.
67 hours
10 hours
It's usually three hours on a school night.