Write ^3 square root 21^5 using rational exponents->

I'm lost at how to write ^3 square root 21^5 using rational exponents.

Anyone who can help will get Best Answer :} Thanks!

I assume that the 3 is a little 3 next to the root sign indicating cube root rather than square root. If so then

cube root 21^5 = 21^(5/3)

Use the rule

nth root of (p^q) = (nth root of p)^q = p^(q/n)