Question

Hello i did this question on my own because I thought I understood it but it was wrong I got 1/2

Answer 1

Given a number 'a', we have the following general rule for exponent:

$a^{-n}=\frac{1}{a^n}$

in this case, we have:

$3^{-4}=\frac{1}{3^4}=\frac{1}{81}$