Answer:
6561
Explanation:
When using exponents it is important to not overestimate them. I know at first glance they look scary, but in reality ,they can be quite simple. When you see 9^4 just remember that all it is asking, is for you to multiply 9 by itself four times. So it 9 to the 4th power is really just 9*9*9*9. See it really is simple. =)