To calculate the cooking time for a 9-pound turkey with a recommended cooking time of 15 minutes per pound, you can use the following formula:
Cooking time = Weight of turkey (in pounds) × Cooking time per pound (in minutes)
For a 9-pound turkey: Cooking time = 9 pounds × 15 minutes/pound = 135 minutes
Now, convert 135 minutes into hours: 135 minutes ÷ 60 minutes/hour = 2.25 hours
Therefore, Nelson should allow 2.25 hours for the turkey to cook.