Final answer:
To convert the 1.5-ounce ointment to grams, multiply by 28.35 to get 42.525 grams, which is rounded to 43 grams. The closest answer choice, accounting for possible rounding discrepancy, is 42 grams.
Step-by-step explanation:
To convert the prescription of a 1.5-ounce ointment tube into grams, we need to use the conversion factor that 1 ounce is approximately equal to 28.35 grams. We multiply the number of ounces by this conversion factor:
1.5 ounces × 28.35 grams/ounce = 42.525 grams
Since prescription quantities are typically rounded to the nearest whole number, the prescription will need 43 grams of ointment, which is not exactly an option provided. However, the closest answer choice to 43 grams is 42 grams (Option a). Therefore, we consider a slight discrepancy in rounding or an inaccuracy in the options provided.