Please help! This may be simple but I have no idea how to take the ln of anything!!! 26.5 = ln(x/0.100)
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"26.5 = ln(x/0.100)" I'd start with this transformation: $\displaystyle e^{26.5}\;=\;\frac{x}{0.100}$ Or this one, if you like: 26.5 = ln(x) - ln(0.100)