Chapter 8 Slide the Eraser

Question 1

• write the following using exponents?

7 · 7

2 · 2 · 2

x · x · x· x · x· x · x

Question 2

Question 3

Question 4

5

34

23

))(3

))(2

)1

ab

y

nn

Question 5

32

2

3

25

43

)5

4 )4

2 )3

777 )2

)1

ba

b

xy

pp

Question 6

Question 7

Question 8

Question 9

45

8

208

3

62

3

7

)3

x

1 5)

4 )2

4

2 4)

3

3 )1

xx

x

xx

Question 10:

3

58

2

2

3

10

7

yx

yx

b

b

• a) 2.834 x 102

• c) 7.8 x 10-1

• b) 4.9 x 105

• d) 1.23 x 10-6

• a) 34,690

• c) 0.039

• e) 5,600,000,000

• b) 1.78

• d) 0.00072

• a) (1.4 x 104)(7.6 x 106)

• c) (4.0 x 10-2)3

• b) 4

1

108.4

102.1

Graphing Exponential Functions

• Make a table of values for t the function y = 5x

x y

-2

-1

0

1

2

Graphing Exponential Functions• Make a table of values for t the function

y = (1/3)x

x y

-2

-1

0

1

2

• You deposit $500 in an account that pays 8% annual interest compounded yearly. What is the account balance after 6 years?

C= 500

r = .08

t = 6

y = 500(1+.08)6

• You bought a used car for $18,000. The value of the car will be less each year because of depreciation. The car depreciates at the rate of 12% per year.

• a) Write an exponential decay model to represent this situation.

y = 18,000(1-.12)t

• b) Estimate the value of your car in 8 years.

y = 18,000(1-.12)8