# How do you evaluate log sqrt 0.0001?

I found $- 2$ but I considered base $10$ for your log.
I assume a log in base $10$ so you have:
${\log}_{10} \left(\sqrt{0.0001}\right) = {\log}_{10} {\left(\frac{1}{10000}\right)}^{\frac{1}{2}} = \frac{1}{2} \left[{\log}_{10} \left(1\right) - {\log}_{10} \left(10000\right)\right] = \frac{1}{2} \left[0 - 4\right] = - 2$