1. WARM UP OPERATIONS WITH DECIMALS Find the value of the expression. 1.32.8 – 4 2.3.98 + 5.50 3.0.1(50) 3

2. WARM UP OPERATIONS WITH DECIMALS Find the value of the expression. 1.32.8 – 4 2.3.98 + 5.50 3.0.1(50) 2

3. WARM UP OPERATIONS WITH DECIMALS Find the value of the expression. 1.32.8 – 4 2.3.98 + 5.50 3.0.1(50) 1

4. OPERATIONS WITH DECIMALS Find the value of the expression. 1.32.8 – 4 2.3.98 + 5.50 3.0.1(50) WARM UP 0

5. Required Class Supplies Paper Pencil (no pen) Scientific Calculator (preferably Texas Instruments TI-30x) *you will need these supplies everyday!

6. 1.2 Exponents and Powers GOAL: Evaluate a Power. KEY WORDS: Power Exponent Base Grouping Symbols

7. 1.2 Exponents and Powers An expression like 2 3 is called a power. The exponent 3 represents the number of times the base 2 is used as a factor. 2 3 = 2∙ 2∙ 2 base exponent

8. 1.2 Exponents and Powers The expression 2 3 means “multiply 2 by itself 3 times.” The numbers you multiply are factors. In general, a n a n = a∙ a∙ a … ∙ a n times

9. EXAMPLE 1: Read and Write Powers Express the power in words. Then write the meaning. 1.2 Exponents and Powers EXPONENTIAL FORMWORDS MEANING 4 2 Four to the second power4 ∙ 4 or four squared 5 3 Five to the third power5 ∙ 5 ∙ 5 or five cubed x 6 x to the sixth powerx ∙ x ∙ x ∙ x ∙ x ∙ x

10. 1.2 Exponents and Powers CHECKPOINT Write the expression in exponential form. 1.3 squared 2.x to the fourth power 3.s cubed

11. EXAMPLE 2: Evaluate the power Evaluate x 4 when x = 2 SOLUTION 1Substitute 2 for x.x 4 = 2 4 2Write out the factors.=2 ∙ 2 ∙ 2 ∙ 2 3Multiply the factors.=16 ANSWER > The value of the power is 16. 1.2 Exponents and Powers