Question

What is the value of the expression 8 to the -2nd power? a. –16 b. 1/64 c. 1/16 d. 64

Answer 1

$a^{-n}=\dfrac{1}{a^n}\\\\8^{-2}=\dfrac{1}{8^2}=\dfrac{1}{8\cdot8}=\boxed{\frac{1}{64}}$

Answer 2

The answer is b. 1/64