If logarithms seem like Greek to you, this interactive algebra 2 lesson will help you sort things out. We can use many bases for a logarithm, but the bases most typically used are the bases of the common logarithm and the natural logarithm. The common logarithm has base 10, and is represented on the calculator as log(x). The natural logarithm has base e, a famous irrational number, and is represented on the calculator by ln(x). The natural and common logarithm can be found throughout Algebra and Calculus.

### What Are Natural and Common Logarithms?

This video is courtesy of Bill White (YouTube)

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