Write as the sum and/or difference of logarithms. Express powers as factors. log10

A. log10m + log10n - log10k
B. log10m + log10n - 2log10k
C. log10m ? log10n ÷ 2log10k
D. 7log10m + 9log10n - 2log10k


Answer: B

Mathematics

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A.
B.
C. - 
D. - 

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