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Mathematics 13 Online
OpenStudy (anonymous):

what is 9^-2.5?

OpenStudy (anonymous):

\[2.5=\frac{5}{2}\] \[9^{-\frac{5}{2}}=\frac{1}{9^{\frac{5}{2}}}=\frac{1}{\sqrt{9^5}}\]

OpenStudy (anonymous):

\[=\frac{1}{3^5}=\frac{1}{243}\]

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