Final answer:
To calculate the correct dose for a 5-year-old child using Young's rule, multiply the child's age in years by the adult dose and divide by the sum of the child's age and 12. In this case, the child should receive a dose of approximately 22.06 mg.
Step-by-step explanation:
To calculate the correct dose for a 5-year-old child using Young's rule, we need to determine the appropriate fraction of the adult dose. Young's rule states that the child's dose is equal to the adult dose multiplied by the child's age in years, divided by the sum of the child's age and 12. In this case, the child's age is 5, so the fraction is 5/17.
Next, we multiply the fraction by the adult dose of 75 mg:
Child's dose = (5/17) * 75 mg = 22.06 mg.
Therefore, the child should receive a dose of approximately 22.06 mg.