If log10 2 = 0.3010, the value of log10 80 is:

A. 1.6020 B. 1.9030
C. 3.9030 D. None of these
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• log 10 80 is to be read as log 80 to the base 10. Now, log 80 = log (10 x 8) = log 10 + log 8 = 1 + log 2^3 = 1 + 3 * log 2 = 1+ 3 * 0.3010 = 1.9030
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