When 9 2/3 is written in simplest radical form, which value remains under the radical?

a. 3

b. 6

c. 9

d. 27

9 2/3 written as an improper fraction, which I assume is what you mean, would be 29/3. Therefore, 3 would still be under the radical. I would say the answer is A, however, that's only based on the assumption that "simplest radical form" on your assignment also means written as an improper fraction.