1. LESSON OBJECTIVE Write repeated multiplication using exponents. A POWER is a way of writing repeated multiplication. LESSON 1.3 POWERS AND EXPONENTS The BASE of a power is the factor. The EXPONENT of a power is the number of times the factor is used.

2. 5 3 = 555 exponent base factors power READ: five to the third power

3. a n = a a a... a a is a factor n times READ: a to the nth power

4. EXAMPLE 1: After the seventh cell division described in this lesson there are 2 2 2 2 2 2 2 cells. Write this as a power. 2727

5. EXAMPLE 2: Evaluate the power. a)3 4 = 3 3 3 3= 81 b)5 3 = 125 c)8 1 = 8