## Prealgebra (7th Edition)

$x^y$ is the same as multiplying $x$ by itself $y$ times. $4^9 = 4 \cdot 4 \cdot 4 \cdot 4 \cdot 4 \cdot 4 \cdot 4 \cdot 4 \cdot 4 \neq 4 \cdot 9$