[tex]6^5\times6^{-8}[/tex]
Using the principle of indicies
[tex]\begin{gathered} 6^{-8}=\frac{1}{6^8} \\ \text{Therefore} \\ 6^5\times\frac{1}{6^8} \\ \frac{6^5}{6^8} \\ 6^{5-8} \\ 6^{-3}=\frac{1}{6^3}=\frac{1}{216} \end{gathered}[/tex]
The answer is D.
