Chapter 8 Review Answers

1A. Points include: (-2, .014), (-1, .05), (0, .2), (1, .76), (2, 2.9)
1B. Points include: (-2, 48), (-1, 12), (0, 3), (1, .75), (2, .19)

2A. y = .0015 (10)^x
2B. y = 1 (1/3)^x

3A. y = 12500(.91)^x, and y = $7800 after 5 years
3B. y = 50 (1.03)^x and y = $57.96 after 5 years

4A. translation shifts down 5 from the parent
4B. translation shifts 2 to the right and up 3 from the parent

5A. log (base 6) 36 = 2
5B. log (base 3) 27 = 3

6A. log (base 2) .125 = -3
6B. log .001 = -3

7A. 6
7B. 0

8A. -2
8B. -3

9A. log 192
9B. log (base 3) (7x^4)

10A. log (base 2) (5/3)
10B. log (y^3/z)

11A. 2log (base 2) x + 3 log (base 2) y
11B. log 6 + 4 log s - log t

12A. log (base 3) 2 - log (base 3) x
12B. 5 log (base 6) x + 10 log (base 6) y - 2 log (base 6) z

13A. 2.3774
13B. 3.0589

14A. .6599
14B. .6658

15A. 10/3
15B. 8

16A. 5.1962
16B. 500

17A. 18.19 hours
17B. 28.21 years

18A. .8283
18B. 3.7726

19A. 4.307
19B. 1.82 x 10^-4

20A. $301.11
20B. $1169.82