Answer
$b^{n}$ could be read as either the $n^{th}$ power of b or b to the $n^{th}$ power. In this situation, the number b is the base and the number n is the exponent.
Work Step by Step
In mathematics, $b^{n}$ is known as an exponential expression. An example of how this can be applied is $4^{5}$. This can be read as either the $5^{th}$ power of 4 or as 4 to the $5^{th}$ power.