What is the value of y when 49 x 49 x 49 = 7^y?

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• A 6
• B 8
• C 2
• D 1

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Answer: A. 6

49 = 7^2, so 49 x 49 x 49 = (7^2)^3 = 7^(2 x 3) = 7^6. Therefore y = 6.

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