To find the equivalent expression for \( \frac{1}{8^5} \), we can use the rule of negative exponents, which states:
\[ \frac{1}{a^n} = a^{-n} \]
Applying that to \( 8^5 \):
\[ \frac{1}{8^5} = 8^{-5} \]
So the correct response is:
8−5 (8 superscript negative 5 baseline).