Question

Evaluate 8-2.
A. -16
B. -64
C. -1/64
D. 1/64
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Answer 1

I'm assuming you meant to write 8^(-2) or
`8^(-2)` where the -2 is the exponent over the 8.

If my assumption is correct, then we use the rule
`a^(-b) = (1)/(a^b)`

So,

`a^(-b) = (1)/(a^b)\\\\8^(-2) = (1)/(8^2)\\\\8^(-2) = (1)/(64)`

Answer: Choice D. 1/64