The recommended daily allowance of vitamin B2 (riboflavin) is 1.7mg per day for the average adult. If cheese, which contains 5.5 x 10^-6g of riboflavin per gram, were a person's only food source, how many feet of string cheese (diameter 0.15in; density 4.5g/cm^3) would a person have to eat daily to satisfy the minimum requirement? Hint: You can think of the string cheese as a long cylinder with volume r^2L, where r is the radius and L is the length.