If I have this: log(x) = -3.87 and I want to find x, do I assume that this a natural logarithm, or a base 10? In other words, does x = 10^-3.87 or x = e^(-3.87) ???? Thanks!
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I would assume base 10 $\displaystyle \ln(x) $ should be written for base e. Although you can never be 100% sure, ask your teacher
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