Corrections to Finite Mathematics Applied to the Real World, First Printing

For Corrections to the combined book, Finite Mathematics and Calculus Applied to the Real World, press here.

Together with Addison Wesley Longman, we are in the process of eliminating typos and errors from subsequent printings of the Real World series. In the meantime, we hope that this listing of corrections to the first printing will be helpful to instructors and students using the text. (Changes are marked in color.)

p. 53, Instructions to Exercises 19-26 should say "Referring to Exercises 1-18,. . ."

p. 53, Exercise 12. Remove the extra comma in the first set of coordinates.

p. 128, In the bottom half of the page, the second and third matrices of the four that appear should both be

-43-18
0-1326

p. 209, Example 5. In the matrix S, change the entry S₃₃ to 2.

p. 270, Exercise 3 The second constraint should be 2x + y 6

p. 329, Exercise 59, missing text. The exercise should read:
59. Investment JoAnn Smith is considering investing up to $10,000 in three ways: a stock fund run by Integrity Investments, a bond fund sold by Citizen's Bank, and a guaranteed annuity run by Publisher's Insurance. Since the last is less risky than the others, she would like to invest no more than one quarter of the total in the first two funds. On the other hand, the stock fund has the highest historical rate of return, so she would like to invest as much as possible in that. How should she invest her money?

p. 349, Example 5, "In a survey of 400 high school seniors, 120 had not read. . .

p. 362, Exercises 19 & 20
19. (c) How many telephone numbers are possible if no adjacent repeated digits are allowed?
20. (c) How many Social Security Numbers are possible if no adjacent repeated digits are allowed?

p. 363, Exercise 32
32. If 8 male/female couples meet at a reunion and each person dances exactly once with each person of the opposite gender, what is the total number of couples that dance?
(a) 8 . 7 . 6 . 5 . 4 . 3 . 2. 1
(b) 16
(c) 4⁴
(d) 4 . 3 . 2 . 1
(e) 8²

p. 380, Exercise 29. How many groups of five marbles include either the lavender one or exactly one yellow one, but not both?

p. 454, Exercise 18. She gets at least one green one, given that she gets no red, fluorescent pink, or yellow ones.

p. 454, Instructions for Exercises 25-30 should read ". . .were due to begin paying federal student loans in 1992, and the subsequent number who defaulted.

p. 464, Exercise 4. P(X|Y) = 0.6, P(Y') = 0.4 . . .

p. 539 middle of the page. Y1 = 1/((2)^(0.5))e^(-X^2/2)

p. 542, Figure 13, The caption should read: 3 Z 3

p. 596 Exercise 47. The last number in the "Bad Debts" line of the table should be 0.7 (not 0.8).

p. 597 Exercise 58. The vector should be [0.6 0.3 0 0.1]

p. 623 Top of the second column. The first two lines are switched.

p. 625 Exercise 28. The arrow from state 5 to state 3 should point the other way.

p 687. In the tableau, the number in the next to last row of the last column should be 164,400, not 260,300.

p. A-19, line -4. (See Figure 3, which shows the vertex at (1, 4).)

p. A-35 Section 1.2 Answers.
73(b) . . . per time period

p. A-37 Section 1.4 Answers.
43. (a) . . . with domain [0,1,000]
43. (b) . . . with domain (0,1,000]

p. A-38 Section 1.5 Answers.
25. $10 per pound

p. A-39 Section 2.1 Answers.
23. 200 quarts of vanilla and 100 quarts of mocha
35. 33 dirty socks. . . [not pairs of socks]

p. A-40 Chapter 2 Review Exercises.
29. (3/2w+1, 0, 1/2w, w), w arbitrary
59. . . . and 6 servings of sherry; 0 beers, 10 servings of wine, 0 servings of sherry.

p. A-48 Section 4.4 Answers.
9. c = 80; x = 20/3, y = 20/3

p. A-49 Chapter 4 Review Exercises.
31. C = 22; x = 8, y = 2

p. A-49, Section 5.1, Answers
5. A = {1, 2, 3}
7. B = {2, 4, 6, 8}
35. A' C =. . .

p. A-49, Section 5.2 Answers.
21. The part of A outside of both B and C should contain a 4.
23. The intersection between A and C (but outside of B) should contain a 3, not 1.

p. A-50, Section 5.4 Answers
39. C(13,2)C(4,2) C(4,2) 44 = 123,552
41. 13 C(4,2) C(12,3) 4 4 4 = 1,098,240

p. A-51, Chapter 5 Review Exercise Answers.
43. C(12,6) C(4,2)C(2,1)C(1,1)C(3,1)C(2,1) C(4,1)C(2,2)C(1,1)C(3,1)C(2,1) C(4,1)C(2,1)C(1,1)C(3,2)C(2,1) C(4,1)C(2,1)C(1,1)C(3,1)C(2,2) = 756
51. The answer given is correct, but the following equivalent expression is more consistent with answers given to other problems:

p. A-53 Section 6.4 Answers.
29. 8!/8⁸

p. A-53 Section 6.5 Answers.
23. 5%

p. A-58 Section 7.4 Answers. The answers to many of these problems will change depending on how you round in intermediate calculations and whether you use the tables in the book, a calculator or a computer. These answers should be viewed as accurate only up to 2 or 3 significant digits.

p. A-65 Section 8.4 Answers.
37. (b) state 5 (an average of 16/9 times)
41. (e) 7/16

p. A-67 Section 9.4 Answers.
3. . . ., e = 1/5

p. A-68 Section 9.4 Answers.
11. . . ., T. Down can expect to lose by approximately 6,356 votes.

Stefan Waner (matszw@hofstra.edu)

Steven R. Costenoble (matsrc@hofstra.edu)