express 9 1/3 in simplest radical form

To express 9 1/3 in simplest radical form, first convert the mixed number to an improper fraction.

9 1/3 = (9*3 + 1)/3 = 28/3

Now, we need to simplify the fraction 28/3.

To simplify the fraction, we find that 28 is not a perfect square, so we cannot simplify it further.

Therefore, 9 1/3 in simplest radical form is simply 28/3.