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Logarithms

Logarithms are used in chemistry and soil science (pH levels), and in biomathematics and ecology (growth rates).

Try the following questions to refresh your memory and check your skills. If you have any difficulty follow the underlined links for further information.

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Self-Test

Questions
1. What is the number $10$ in the expression $\log_{10}100$ ?
2. What is the value of $\log_{10}100$?
3. What is the value of $\log_{2}8$ ?

4. Calculate $\log 2$. Give your answer to 4 significant figures.

5. Express $\log 2 + 2 \log 3$ as a logarithm of a single number.
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