Pre-Calculus B
Chapter 5 Practice Quiz Answers
C5CQ1 Practice
1. 8
2. 7
3. 2
4. 4
5. 12x2 – 31
6. 48x2 – 72x + 20
7. Vr = πr 8. verify
C5CQ2 Practice
1. Inverse: {(5, -1), (3, 0), (7, 2), (-1, 4), (6, 8)}
D: {-1, 3, 5, 6, 7}
R: {-1, 0, 2, 4, 8}
2. verify
4. f -1(x) =
3.
5. f -1(x) = √x + 3
6. inverse: f -1(x) =
; Show work for the check.
C5CQ3 Practice
1. 11.665
2. 687.291
3. 3.572
4. x = -8
5. x =
6. x =
7. x = 2
8. x = 7, -1
9. x = 6, 2
C5CQ4 Practice
1. 1
2. -3
3. 1
4. −∞, 5. 14, ∞
6.
7.
8. x =
9. x =
10. x =
11. x = −3 + ln
C5CQ5 Practice
1. log4 x – 3
2. 9 log3 x
3. 1 – 6 ln x
4. 9 log x + log(x – 8) – 3 log(x + 2)
5. log4 x8 y9
6. log
"
7. ln "
8. 1.513
9. -2.714
10. 2.980
C5CQ6 Practice
"
1. x = 99997
2. x =
3. x = 4
4. x = -2
5. x = 43
6. x ≈ -1.640
7. x ≈ 0.606
C5CQ7 Practice
1. $681.69
2. $1777.96
3. $247.91
4. $506.20
5. 6.33 yr
6. 7.70 yr
7. 8.11 yr
8. 7.35 yr
C5CQ8 Practice
1. a. 8%
b. 1517.185 grams
c. 6.069 hours
2. 9112.5 bacteria
3. 4200.704 years
4. a. 30.407 grams
b. after 14.664 hours
C5CQ9 Practice
1. a. f(x) = 99.470 (0.930)x
b. 4.4 mg
c. 28.81 hours
2. a. f(x) = 96.859 – 32.162 ln x
b. 3.90 lumens
c. 13.35 hours
3. a. #$ =
.
"." ' ().*+,
b. 233.13º F
c. 19.4 min