Describe how to transform into an expression with a rational exponent. Make sure you respond with complete sentences.

Well the rule for bases with multiple exponents is:

((a^b) ^c) ^d = a^ (b*c*d)

So in this case we have:

(((x^ (1/3)) ^4) ^5

x^ (4*5*1/3)

x^ (20/3)

The "transformation" for a base being raised to multiple exponents is to raise the base to the power of the product of all exponents.