What makes the statement true? 9 e-2 = ?

Mathematics
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What makes the statement true? 9 e-2 = ?

(Tip: e stands for exponent)

a. 81 b. 18 c. 1/81 d. - 1/81

Oct 1st, 2014

C because 9 e-2 = 1/9e2

                           = 1/9^2

                            =1/81

Oct 1st, 2014

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