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Exponents, Ex 5A

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1 Answer

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barbie5878, hello

The hint provided makes this problem very easy to solve. Using the hint  ...

 (2x5)n-4 = (10)4  ==> (10)n-4 = (10)4  ==> n-4 = 4  ==>  n = 8

Please let me know if this helps.

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