The U.S. RDA for riboflavin for a boy is 1.7 mg. If a glass of milk
contains .41 mg, approximately how many glasses would a boy have to
drink to satisfy his requirement?
a. 4
b. 0.25
c. 0.4
d. 1
1. The boy needs 1.7 mg of riboflavin per day.
2. One glass of milk contains 0.41 mg of riboflavin.
3. Divide the needed amount by the amount in one glass of milk: 1.7 mg รท 0.41 mg/glass = approximately 4.15 glasses.
4. Rounded to the nearest whole number, the answer is 4.
Therefore, the correct answer is a. 4.