Respuesta :

aggie5
C is the answer because when you square nine you get 81 but you can't have a negative so you have to put a one over it as he numerator
apologiabiology
remember
[tex]x^{-m}= \frac{1}{x^m} [/tex]
so

[tex]9^{-2}= \frac{1}{9^2}= \frac{1}{81} [/tex]

C is the answer

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