Answer: 5:42:2 am
Step-by-step explanation:
He bought a 16 1/2 pound turkey. Converting to improper fraction, it becomes 33/2 pounds of turkey.
The cookbook says to cook the turkey for 20 minutes per pound and 25 minutes per pound if the turkey is stuffed. Since he wants to stuff the Turkey, he would have to cook for 25 minutes per pound. The total amount of time that he would have to cook the stuffed turkey will be 25 × 33/2 = 412.5 minutes
Let us converted to hours
If 60 minutes = 1 hour,
412.5 minutes = 412.5/60 = 6.875
He would spend 6.875 = 55/8 hours
in cooking the stuffed turkey.
The cookbook also says to let the turkey cool for 10 minutes after coming out the oven. Let us convert the 10 minutes to hours
60 minutes = 1 hour
10 minutes = 10/60 = 1/6
Total time it will take to get the Turkey ready for dinner will be
1/6 + 55/8 = 169/24 = 7.042 hours which means 7 hours, 2 minutes and 58 seconds
If he has to have dinner ready for 12:45 pm, he needs to put the turkey in the oven at 5:42:2 am at most