# How do you evaluate ln 0.1 using a calculator to four decimal places?

$- 2.3026$

#### Explanation:

First off, I'm assuming you are using a scientific calculator. If you don't have access to one, you can use Google's online calculator (searching "google calculator" will bring it up. You can also simply type in "ln.1" in a google browser and the answer will come up.)

Depending on your calculator, you many need to hit:

$\ln , .1$

and others will want

$.1 , \ln$

In either case, the result that will come up is:

$- 2.30258 \ldots$

and we can round this to four decimal places by looking at the fifth place, seeing it's greater than or equal to 5, and therefore increasing the fourth decimal place by one, so that we get:

$- 2.3026$