Final answer:
The turkey will be ready at 1:30 PM.
Step-by-step explanation:
To find out when the turkey will be ready, we need to add the cooking time to the time it was put in the oven.
5 hours and 15 minutes can be written as 5:15 in time format.
Adding 5 hours and 15 minutes to 8:15 AM:
- 8 + 5 = 13 (carry over 1)
- 15 + 15 = 30 minutes
So, the turkey will be ready at 1:30 PM.