CEMC Fermat, 2011

Algebra Difficulty 2.0 Junior Find the answer Canada

If $3^{2x} = 64$ , then $3^{-x}$ is equal to

(A) $-32$ (B) $-8$ (C) $\frac{1}{4096}$ (D) $\frac{1}{32}$ (E) $\frac{1}{8}$

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