Answer:
8:15 am
Explanation:
Count back from 9:05 50 minutes. I did it in parts.
First, I went back 5 minutes:
9:05 am 50 minutes elapsed
9:00 am 45 minutes elapsed
Then I went back the rest of the 45 minutes
9:00 am 45 minutes elapsed
8:15 am 0 minutes elapsed