Answer: 5:10 A.M.
Explanation:
First find the total time that Isabelle spent playing volleyball and hiking.
= 2 hours and 10 minutes + 1 hour and 55 minutes
= 4 hours and 5 minutes
If she finished both activities at 11:15 am, the time she started was:
= 11:15 - 4 hours 5 minutes
= 5:10 A.M.