Express the following numbers as powers: a) 9, b) 25, c) 49, d) 27, e) 121, f) 125.

$$9 = 3^2$$

The answer is $\boxed{3^2}$.

$$25 = 5^2$$

The answer is $\boxed{5^2}$.

$$49 = 7^2$$

The answer is $\boxed{7^2}$.

$$27 = 3^3$$

The answer is $\boxed{3^3}$.

$$121 = 11^2$$

The answer is $\boxed{11^2}$.

$$125 = 5^3$$

The answer is $\boxed{5^3}$.