1. 9.1 Powers and Exponents
Objective: students will lear what powers are and how to write them. They will also apply order of operations and evaluate them.

2. Properties of powers Power: repeated multiplication of same number
Ex: 43 is 4 x 4 x 4
Power has 2 parts:
Base: number being multiplied 23
Exponent: number of times multiplying

3. Identify the base and exponent for each24 63 25
Student
106
419
178

4. Write as repeated math or as exponential form
3 x 3 x 3 x 3 x 3
2 x 2 x e x e x f 27
5.3 x 5.3
6 x 6 x 6 x u x u x p x p
135

5. Student: Write as repeated math or exponential form
3 x 3 x 3 74
4 x 4 x 4 x 4 x j x k x k x k
2.3 x 2.3 x I x I x I x e x e x e x e x e
1.92
2 x 2 x 2 x 2 x 2 x 2

6. Evaluate Powers with Variables
Evaluate expression when h = 4, h3+ 4
Ex: Evaluate expression of x3 - 2 when x = 3.

7. Student Examples
Evaluate y3 – 6 when
y = 7
Evaluate x2 when
x = 1.2

8. Powers in formulas Some formulas involve exponents!
Area
Volume
Area measured in square units: s2
In2, m2, ft2
Volume measured in cubed units: s3
In3, m3, ft3

9. Powers in formulas
Find area
Find volume 2 12

10. Student Examples
Find area
Find volume
5ft
5cm
8ft
9 in

11. Wrap - up
Questions/Comments
Hw: Workbook pg. 115