Final answer:
Approximately 266.22 mg of Tylenol remains in Makenzie's body after 5 hours.
Step-by-step explanation:
The amount of Tylenol remaining in Makenzie's body after n hours is given by the formula A = 600(0.86)^n.
To find how much Tylenol remains after 5 hours, we substitute n = 5 into the formula:
A = 600(0.86)^5
A = 600(0.44370528)
A ≈ 266.22
Therefore, approximately 266.22 mg of Tylenol remains in Makenzie's body after 5 hours.