None of those choices.
I suspect a typo.
If you want to check, just type into the google box
3^(2/3)
or any of the choices. You will see that there's no joy.
However,
3^(3^2) = 3^9
2^(3^2) = 2^9
3^(3^3) = 9^(3/2) = 27
What is 3 to the power of two thirds equal to?
3 to the power of 9
2 to the power of 9
3 to the power of 27
2 to the power of 27
1 answer