Section 4.3 Rules of Logarithms

Before Starting this Section, Review

  1. 1 Definition of logarithm (Section 4.2 , page 445)

  2. 2 Basic properties of logarithms (Section 4.2 , page 447)

  3. 3 Rules of exponents (Section 4.1 , page 425)

Objectives

  1. 1 Learn the rules of logarithms.

  2. 2 Estimate a large number.

  3. 3 Change the base of a logarithm.

  4. 4 Apply logarithms to growth and decay.

The Boy King Tut

Today the most famous pharaoh of Ancient Egypt is King Nebkheperure Tutankhamun, popularly called “King Tut.” He was only 9 years old when he became a pharaoh. In 2005, a team of Egyptian scientists headed by Dr. Zahi Hawass determined that the pharaoh was 19 ...

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