logarithm

Lisacow:

How would you type in a log of5 instead of 10

You can't but you can use change of base rule

log ₅26 = log26 / log5 = approx 2.024

And that is in whatever base you like.

This is a page that I refer to constantly.
http://en.wikipedia.org/wiki/List_of_logarithmic_identities