Final answer:
The expression that is equal to (f(b))^% is (a^b)*%.
Step-by-step explanation:
To find the expression that is equal to (f(b))^%, we need to apply the properties of exponential functions. In the given function f(x) = a^x, a represents the base and x represents the exponent. In this case, f(b) would be equal to a^b.
Therefore, the expression (f(b))^% can be written as (a^b)^%. According to the properties of exponents, when we raise a power to another power, we multiply the exponents. So, (a^b)^% becomes a^b*%.
Hence, the correct expression is (a^b)*% which is option D.