Logarithms

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This is probably really easy for all you guys, but I can't see the answer:

Given that log 2 = 0.3, show that log 5 = 0.7

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Try to make use of the following identities:

$log_b(x)+log_b(y)=log_b(xy)$

$log_b(b)=1$

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thanks. ive worked it out now...

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