Answer:
A. 1/8³
Step-by-step explanation:
One of the ways to think about this is to remember that an exponent signifies repeated multiplication. Common factors in the numerator and denominator cancel.
[tex]\dfrac{8^3}{8^6}=\dfrac{8\cdot8\cdot8}{8\cdot8\cdot8\cdot8\cdot8\cdot8}=\dfrac{1}{8\cdot8\cdot8}=\boxed{\dfrac{1}{8^3}}[/tex]