1. Powers and Exponents
Lesson #2
Pg. 175

2. What You’ll Learn Power Base Exponent
Numbers using an exponent and base
Base
The common factor in a power
Exponent
The number of times the base is used as a factor

3. Write and Evaluate Powers
A product of repeated factors can be expressed as a power, that is, using an exponent and a base.
The base is the common factor
The exponent tells how many times the base is used as a factor

4. Read and Write Powers Read and Write Powers Power Words Factors
3 to the first power
3 to the second power or 3 squared
3 to the third power or 3 cubed
3 to the forth power or 3 to the forth
3 to the nth power or 3 to the nth

5. Negatives Raised to Exponents
(-) Raised to Even Exponents
Will be positive (+)
(-) Raised to Odd Exponents
Will be negative (-)
Watch for Parentheses
(-3) (3)2

6. Examples
Write each expression using exponents

7. Evaluate Examples What is the area of the skateboard deck?
The deck of a skateboard has an area of about • 7 in2.
What is the area of the skateboard deck?

8. Substitution Examples (USE PARENTHESES)
Evaluate each expression if
a = 3 and b = 5

9. Substitution
Evaluate if c = - 4 and d = 9

10. Homework
Group #1: pg
(1-14, 16)
Group #2: pg
(1-16)