Answer:
9
Step-by-step explanation:
Answer: 9
When something is to a certain power, you multiply the number times itself by the power shown.
3 to the 2nd power would be 3 x 3
3 to the 3rd power would be 3 x 3 x 3
3 to the 4th power would be 3 x 3 x 3 x 3
