Answer :
Final answer:
Jonathan’s protein RDA is calculated by converting his weight to kilograms and multiplying by the recommended 0.8 grams of protein per kilogram for sedentary adults. The result is roughly 64.36 grams/day, which means the closest answer is 64 grams/day.
Explanation:
The Recommended Dietary Allowance (RDA) for protein for a sedentary adult male like Jonathan is 0.8 grams of protein per kilogram of body weight daily. To calculate Jonathan’s protein RDA, we must first convert his weight from pounds to kilograms. Since there are approximately 2.2 pounds in a kilogram, we divide Jonathan’s weight by 2.2.
177 pounds ÷ 2.2 pounds/kg = 80.45 kg
Next, we multiply Jonathan's weight in kilograms by the RDA for protein:
80.45 kg × 0.8 g/kg/day = 64.36 grams/day
Therefore, the closest answer to Jonathan’s protein RDA is 64 grams/day, which is option D.
