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What is 3^-2 (it is 3 to the -2 squared)

I thought the answer was 1/9
and my friend thought it is .1 repeated
.1 with the line over it

can you tell us which one of us is correct?
Thank you

1 answer

You are both correct since

.1111.... = 1/9

(do 1÷9 on your calculator)

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