# How to solve a log problem???

• Nov 11th 2009, 02:26 PM
Kim Nu
How to solve a log problem???
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!
• Nov 11th 2009, 02:36 PM
pickslides
I would assume base 10

$\ln(x)$ should be written for base e.