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)

### Citation styles

- APA style
- What Are Natural and Common Logarithms?. (2013, March 2). In
*ClassBrain Math Tutorials*. Retrieved 04:23, May 22, 2018, from http://www.classbrainmath.com/natural-and-common-logarithms/ - MLA style
- Cynthia Kirkeby, “What Are Natural and Common Logarithms?.”
*ClassBrain Math Tutorials*. 2 March 2013, 11:02 UTC. . 22 May 2018 <http://www.classbrainmath.com/natural-and-common-logarithms/>. - MHRA style
- Cynthia Kirkeby, 'What Are Natural and Common Logarithms?',
*ClassBrain Math Tutorials*, 2 March 2013, 11:02 UTC, <http://www.classbrainmath.com/natural-and-common-logarithms/> [accessed 22 May 2018] - The Chicago Manual of Style
- Cynthia Kirkeby, “What Are Natural and Common Logarithms?.”
*ClassBrain Math Tutorials*, http://www.classbrainmath.com/natural-and-common-logarithms/ [accessed May 22, 2018]. - CBE/CSE style
- Cynthia Kirkeby, What Are Natural and Common Logarithms? [Internet]. ClassBrain Math Tutorials; 2013 March 2, 11:02 UTC [cited 2018 May 22]. Available from: http://www.classbrainmath.com/natural-and-common-logarithms/.
- Bluebook style
- What Are Natural and Common Logarithms?, http://www.classbrainmath.com/natural-and-common-logarithms/ (last visited May. 22, 2018).
- AMA style
- Cynthia Kirkeby, What Are Natural and Common Logarithms?. ClassBrain Math Tutorials. March 2, 2013, 11:02 UTC. Available at: http://www.classbrainmath.com/natural-and-common-logarithms/. Accessed May 22, 2018.