Find each elapsed time.

1. Start: 3:52 P.M. End: 4:10 P.M.
2. Start: 3:15 P.M. End: 5:00P.M.
3. Start:11:35 A.M. End:12:20P.M.
4. Start: 8:20 A.M. End: 2:35 P.M

1. The elapsed time is 18 minutes.

2. The elapsed time is 1 hour and 45 minutes.
3. The elapsed time is 45 minutes.
4. The elapsed time is 6 hours and 15 minutes.