#### Answer

$9^{2}=x$

#### Work Step by Step

From the definition of the logarithmic function on page 456, we know that $y=log_b{x}$ is equivalent to $b^{y}=x$ (for $x\gt0$, $b\gt0$, and $b\ne1$).
Therefore, $2=log_9{x}$ is equivalent to $9^{2}=x$ in exponential form.