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### Common Logarithms

Solve exponential equations by taking the common log of both sides of the equation. You can then use a calculator to get a decimal approximation of the answer.

If you want to get a decimal approximation of a logarithmic expression, convert the log expression to a log expression to the base 10 using the change of base formula. Then use a calculator to evaluate the new expression.

### Common Logarithms

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

- Intro 0:00
- What are Common Logarithms? 0:54
- Base 10
- Equations 2:00
- Examples
- Inequalities 5:35
- Example
- Change of Base 9:23
- Example
- Lecture Example 1 12:04
- Lecture Example 2 15:16
- Additional Example 3
- Additional Example 4

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