1. Properties and Applications of Logarithms

2. Properties of Logarithms

3. Change of Base Formula

4. Applications of Logarithmic Functions

5. Earthquake intensity is measured on the Richter scale.  In the formula that follows, I0 is the intensity of a just-discernable earthquake, I is the intensity of an earthquake being analyzed, and R is its ranking on the Richter Scale:

6. Sound Intensity