1. 1.2 Exponents and Powers An expression like is called a power. The exponent 3 represents the number of times the base 2 is used as a factor.

2. Examples ExponentialFormWordsMeaning four to the second power or four squared Five to the third power or five cubed X to the sixth power

3. Practice A. 3 squared B. x to the fourth power C. s cubed

4. Evaluate the Power Evaluate when x = 2 = = 16

5. Grouping Symbols -Indicate the order in which the operations should be performed. -Operations within the innermost set of grouping symbols are done first -( ) parentheses -[ ] brackets

6. Evaluate Exponents a = 1 and b = 2 A. 5

7. Practice a = 1 b = 2 B. (a + b)

8. Exponents and Grouping x = 4 A. B.

9. Real-Life Applications Exponents are often used in the formulas for area and volume. Squared and Cubed Area and Volume

10. Finding Volume An aquarium has the shape of a cube. Each edge is 2.5 feet long. a.Find the volume in cubic feet. b.How many gallons of water will the cubic aquarium hold? Convert to liquid volume, where one cubic foot holds 7.48 gallons.