Answer: (I think its correct)
1: 8 hours and 30 minutes
2: 8 hours
3: 8 hours and 50 minutes
4: 8 hours and 45 minutes
5: 7 hours and 48 minutes
6: 11 hours 13 minutes
7: 11 hours 31 minute
Step-by-step explanation: (Im bad at explaining it)
So I got this by using counting the hours in between the times and taking out the minutes in them,then subtracting the time they took the fall asleep. Every time that has minutes I add that, if it is over 60 minutes I subtract 60 minutes. So like 30+35=65 | 65-60=5.
Lets do a problem: 9:15 (bed) | 10:30(woke up) | 30 minutes (fall asleep)
So we count how many hours in each time and we take out the minutes, so 9:00, 10:00, 11:00, so on and so forth.
So in between the hours its was 13. Then we add the minutes (15+30)
15+30=45. So the answer is 13 hours and 45 minutes, but we got to subtract 13 hours and 45 minutes which is 13 hours and 15 minutes.
Final Answer: 13 hours and 15 minutes.
. In our case it's 
