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OpenStudy (anonymous):
Simplify the expression so there are no negative exponents (9)^-2 a)81 b)-18 c-1/81 d)1/81 my answer a)81???? Simplify the expression so there are no negative exponents (9)^-2 a)81 b)-18 c-1/81 d)1/81 my answer a)81???? @Mathematics
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