To evaluate \( 6^{-2} \), we can use the property of exponents which states that \( a^{-n} = \frac{1}{a^n} \).
So, \( 6^{-2} = \frac{1}{6^2} \).
Calculating \( 6^2 \):
\[ 6^2 = 36 \]
Therefore,
\[ 6^{-2} = \frac{1}{36} \]
Among the options you provided, the equivalent expression is:
1/36 (or \( \frac{1}{36} \)).