David Arnold

Mathematics

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Math 120: Homework Assignments

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Homeworks and activities will be accumulated on this page throughout the semester. Please return often as this page will be updated frequently.

Directions: Please follow these directions on all homework Homeworks.

1. It is recommended, but not required, that you do all of your homework on engineering graph paper (available in the bookstore).
2. On each homework Homework, place your name in the top right corner of the page.

3. On the first line of the of the first page of your homework, please write down the Homework number, the pages that encompass the assignement, and list each exercise number assigned. For example, the first line of your homework might read:

   Homework #12, Page 150, #1, 3, 5, 7, 8, 10, 11, 23, 45

4. If an Homework takes more than a page, please staple the pages together with a single staple in the upper left-hand corner.
5. Simple one or two word answers or choices without explanatory prose are not acceptable. In all cases, use sound writing to justify your response.
6. Please do not do computation for a problem on one sheet of paper, then refer to a graph or diagram on another sheet of paper near the end of your stapled packet. Keep your work together, compuations and graphs and diagrams in the same general neighborhood on your homework.
7. Please do not crowd your work on your paper. Space things out and avoid tiny diagrams that are hard to read (please be nice to my old eyes).
8. Homeworks will be handed in during classtime in separate piles: the Homework #1 pile, the Homework #2 pile, etc., so please do not staple two or more Homeworks together.

Fall 2009

Assignment #0 (E4260 Due Aug. 26, T3761 Due Aug. 27)
• Read the Syllabus
• After logging onto myCR at http://myCR.redwoods.edu/, click the Account tool, then click the Modify Details button and create a new password. Make sure to write it down somewhere for safety. Next, click the Profile tool and fill in information you want to share. I probably wouldn't enter phone numbers and other information you want to keep private.
• Once you've updated your password and profile, read the welcome message on the Discussion Board and reply to the thread.
• Assignment #1 (E4260 Due Aug. 26, T3761 Due Aug. 27)
• • Make sure the latest version of the Adobe Reader that can be supported by your system is installed on your computer. After installation, open the Adobe Reader and when prompted "do you want to make this application the default reader for PDF files," answer "Yes." This is especially important on the Macinstosh, otherwise OPTIMATH quizzes will open in Preview and will not work properly.
  • Read Introduction to Optimath.
  • Watch the video Logging on to Optimath.
  • If your name has a hyphen, apostrophe, or space, watch the video Logging on to Optimath (Special Names).
  • Go to Optimath, select the link Math 120, David Arnold, and log in. Make sure you click the link of the section in which you are enrolled.
    • Note: Macinstosh users must use the Safari browser. Firefox does not work with Adobe Reader or the Optimath system on the Macintosh.
  • Complete the quiz "Test your Browser."
• Assignment #2 (E4260 Due Aug. 26, T3761 Due Aug. 27)
• • Read Writing Mathematical Formulas in Optimath.
  • Watch these videos:
    1. Interval Notation (Part 1).
    2. Interval Notation (Part 2).
    3. Interval Notation (Part 3).
    4. Rational Expressions.
  • Try your hand at "inline expressions" using our Syntax Checker. Note: Both Mac and Windows users must open the syntax checker application in Firefox.
  • Go to Optimath, select the link Math 120, David Arnold, and log in. Make sure you click the link of the section in which you are enrolled.
    • Note: Macinstosh users must use the Safari browser. Firefox does not work with Adobe Reader or the Optimath system on the Macintosh.
  • Complete the quiz "First Practice."
• Homework #3 (E4260 Due Aug. 26, T3761 Due Aug. 27)
• • Read Section 1.1. Remember: Reading the section, working the examples with pencil and scratch paper, before attempting the exercises is an essential ingredient to your success in this course.
  • In Exercises 1.1, pages 11-12, do exercises #5, 6, 15, 17, 20, 25, and 27.
• Homework #4 (E4260 Due Aug. 31, T3761 Due Sept. 1)
• • Read Section 1.2. Remember: Reading the section, working the examples with pencil and scratch paper, before attempting the exercises is an essential ingredient to your success in this course.
  • In Exercises 1.2, pages 27-29, do exercises #1, 12, 13, 20, 25, 26, 32, 33, 38, 41, 44, 45, 49, 52, and 53.
• Homework #5 (E4260 Due Aug. 31, T3761 Due Sept. 1)
• • Read Section 1.3. Remember: Reading the section, working the examples with pencil and scratch paper, before attempting the exercises is an essential ingredient to your success in this course.
  • In Exercises 1.3, pages 47-49, do exercises #1, 4, 5, 6, 9, 10, 17, 18, 21, 22, 25, 26, 28, 29, 33, 34, 39, 41, 43, 50, 52, 53, and 56.
• Homework #6 (E4260 Due Sept. 2, T3761 Due Sept. 3)
• • Read Section 1.4. Remember: Reading the section, working the examples with pencil and scratch paper, before attempting the exercises is an essential ingredient to your success in this course.
  • In Exercises 1.4, pages 63-64, do exercises #1, 8, 13, 16, 17, 19, 24, 29, 30, 39, 45, 48, 51, 54, 55, 56, 59, and 62.
• Homework #7 (E4260 Due Sept. 9, T3761 Due Sept. 8)
• • Read Section 2.1.
  • In Exercises 2.1, pages 87-90, do exercises #3, 6, 9, 12, 17, 18, 19, 20, 21, 22, 31, 32, 33, 34, 43, 44, 45, 50, 59, 60, 61, 62, 67, 68, 69, 70, 75, 76, 79, 82, and 83.
• Quiz #1
• • Quiz #1 is offered on Optimath to help prepare for an inclass quiz (E4260 Wednesday Sept. 2, T3761 Thursday Sept. 3). Extra credit will also be awarded for each correct answer on the Optimath quiz.
• Homework #8 (E4260 Due Sept. 9, T3761 Due Sept. 8)
• • Read Section 2.2.
  • In Exercises 2.2, pages 109-110, do exercises #2, 3, 5, 6, 10, 11, 12, 15, 18, and 21.
• Homework #9 (E4260 Due Sept. 14, T3761 Due Sept. 10)
• • Read Section 2.3.
  • In Exercises 2.3, pages 129-134, do exercises #2, 6, 7, 10, 13, 16, 20, 25, 27, and 30.
• Homework #10 (E4260 Due Sept. 14, T3761 Due Sept. 15)
• • Read Section 2.4.
  • In Exercises 2.4, pages 153-169, do exercises #8, 14, 15, 20, 23, 26, 32, 35, and 42.
• Homework #11 (E4260 Due Sept. 16, T3761 Due Sept. 15)
• • Read Section 2.5.
  • In Exercises 2.5, pages 183-186, do exercises #1, 2, 5, 6, 9, 11, 12, 13, 18, 21, 24, 25, 28, 29, 31, and 34 on graph paper. Follow directions given in each exercise exactly!
• Homework #12 (E4260 Due Sept. 16, T3761 Due Sept. 17)
• • Read Section 2.6.
  • In Exercises 2.6, pages 209-211, do exercises #1, 2, 5, 6, 9, 11, 12, 13, 18, 21, 23, 25, and 27 on graph paper. Follow directions given in each exercise exactly!
• Homework #13 (E4260 Due Sept. 21, T3761 Due Sept. 17)
• • Read Section 3.1. There is a nice discussion of two examples in the reading, the first continuous, the second discrete. While you read, here are some important points to which you should give special attention:
    • Scaling the axes is a bit of an art form that develops with continued experience. Don't be overly frustrated in your first attempts. There are two things to keep in mind when scaling the axes:
      1. Choose a scale that produces a nice-sized graph. Tiny graphs are hard to read which usually leads to errors.
      2. Choose a scale that makes plotting points with the given rate an easy task.
    • Note that if a quantity is increasing at a constant rate, then the graph must be linear.
    • Note the intuitive way that the narrative develops an equation for the model. Later in the chapter we will connect this to the form y = mx + b.
  • There are no problems assigned in this section, so devote your effort to reading the examples in the section. It will pay off in the upcoming sections in the chapter.
• Homework #14 (E4260 Due Sept. 21, T3761 Due Sept. 17)
• • Read Section 3.2.
  • In Exercises 3.2, pages 261-266, do exercises #6, 7, 8, 13, 14, 19, and 22. Follow all the given directions exactly to receive credit for this Homework. All work is to be done on graph paper!
• Homework #15 (E4260 Due Sept. 21, T3761 Due Sept. 17)
• • Read Section 3.3.
  • In Exercises 3.3, page 283-288, do exercises #5, 6, 10, 12, 13, 15, 17, 18, 22, 26, 27, 35, 36, 41, 44, 47, and 48. Follow all the given directions exactly to receive credit for this Homework. All work is to be done on graph paper!
• Homework #16 (E4260 Due Sept. 23, T3761 Due Sept. 22)
• • Read Section 3.4.
  • In Exercises 3.4, pages 305-311, do exercises #1, 4, 9, 12, 17, 20, 21, 24, 32, 34, and 35. Follow all the given directions exactly to receive credit for this Homework. All work is to be done on graph paper!
• Homework #17 (E4260 Due Sept. 23, T3761 Due Sept. 24)
• • Read Section 3.5.
  • In Exercises 3.5, pages 321-329 do exercises #1, 3, 7, and 8.
• Homework #18 (E4260 Due Sept. 28, T3761 Due Sept. 29)
• • Read Section 4.1.
  • Pages 347-340, do exercises #2, 5, 7, 10, 11, 14, 16, 17, 20, and 21.
• Homework #19 (E4260 Due Oct. 5, T3761 Due Sept. 29)
• • Read Section 4.2.
  • Pages 367-368, do exercises #1, 4, 7, 10, 11, 16, 17, 20, 23, 24, 25, 28, 30, and 35.
• Homework #20 (E4260 Due Oct. 5, T3761 Due Oct. 6)
• • Read Section 4.3.
  • Pages 385-387, do exercises #1, 4, 15, 18, 21, 22, 26, 27, 29, 32, 33, and 35.
• Homework #21 (E4260 Due Oct. 7, T3761 Due Oct. 6)
• • Read Section 4.4.
  • Pages 391-393, do exercises #1, 3, 5, 8, 11, 19, 23, 24, 25, 29, 31, 32, 36, 37, 41, 44, 45, 47, 49, 51, and 53.
• Homework #22 (E4260 Due Oct. 12, T3761 Due Oct. 8)
• • Read Section 5.1.
  • Pages 433-436, do exercises #23, 25, 31, 32, 33, and 36.
• Homework #23 (E4260 Due Oct. 12, T3761 Due Oct. 13)
• • Read Section 5.2.
  • Pages 453-455, do exercises #45, 46, 51, 52, 55, 56, and 59.
• Homework #24 (E4260 Due Oct. 14, T3761 Due Oct. 13)
• • Read Section 5.3.
  • Page 473-476, do exercises #11, 16, 18, 19, 26, 29, 40, 45, 48, 49, 56, and 57.
• Homework #25 (E4260 Due Oct. 14, T3761 Due Oct. 15)
• • Read Section 5.4.
  • Page 497-500, do exercises #17, 23, 28, 31, 33, 37, 40, 43, 46, 51, 52, and 57.
• Homework #26 (E4260 Due Oct. 19, T3761 Due Oct. 22)
• • Read Section 5.6.
  • Page 541-543, do exercises #1, 8, 21, 23, 26, 28, 33, 37, 39, and 40.
• Homework #27 (E4260 Due Oct. 19, T3761 Due Oct. 22)
• • Read Section 6.1.
  • Page 559-561, do exercises #2, 5, 7, 9, 12, 15, 18, 20, 21, 23, 24, and 30.
• Homework #28 (E4260 Due Oct. 21, T3761 Due Oct. 27)
  • Read Section 6.2.
  • Pages 577-579, do exercises #5, 10, 11, 15, 18, 19, 22, 25, 26, 29, 35, 39, and 43.
• Homework #29 (E4260 Due Oct. 26, T3761 Due Oct. 27)
  • Read Section 6.3.
  • Pages 593-595, do exercises #11, 16, 17, 19 and 20.
• Homework #30 (E4260 Due Oct. 26, T3761 Due Oct. 29)
  • Read Section 7.1.
  • Pages 615-616, do exercises #3, 6, 7, 8, 13, 14, 16, 24, 32, and 40.
• Homework #31
  • Read Section 7.2.
  • Pages 633-635, do exercises #3, 10, 15, 16, 17, 21, 22, 25, 26, 29, 30, 33, 37, 39, 43, 45, 47, and 49.
• Homework #32 (T3761 Due Nov. 2)
  • Read Section 7.3.
  • Pages 655-656, do exercises #1, 5, 7, 11, and 15.
• Homework #33 (E4260 Due Nov.1, T3761 Due Nov. 2)
  • Read Section 7.4.
  • Pages 671-675, do exercises #5, 12, 17, 21, 28, 33, 37, 39, 49, 58, 59, and 66.
• Homework #34 (E4260 Due Nov.1, T3761 Due Nov. 5)
  • Read Section 7.5.
  • Pages 691-692, do exercises # 5, 12, 17, 18, 21, 29, 30, 31, 35, and 37.
• Homework #35 (E4260 Due Nov.3, T3761 Due Nov. 5)
  • Read Section 7.7.
  • Pages 723-726, do exercises #1, 15, 18, 20, 21, 28, 33, 35, 42, 43, 52, and 53.
• Homework #36 (E4260 Due Nov.9, T3761 Due Nov. 10)
  • Read Section 7.8.
  • Pages 743-745, do exercises #1, 2, 5, 6, 13, 14, 16, 25, and 28.
• Homework #37
  • Read Section 8.1.
  • Pages 765-768, do exercises #1, 6, 7, 10, 14, 17, 24, 26, 27, 31, 32, 34, 36, 47, 52, 54, 55, 57, 58, 65, 66, 73, and 74.
• Homework #38
  • Read Section 8.2.
  • Pages 783-784, do each of the following exercises: #2, 3, 5, 6, 10, 11, 13, and 20.
  • Page 785, you should be able to do each of the following without a calculator: #21, 26, 27, and 32.
  • Page 785, do #34, 35, 36, and 39.
• Homework #39
  • Read Section 8.3.
  • Pages 799-801, do each of the following exercises: #1, 4, 8, 9, 10, 18, 24, 25, 26, 33, and 34.
• Homework #40
  • Read Section 8.4.
  • Pages 815-818, do each of the following exercises: #1, 7, 8, 10, 17, 31, 34, 36, 39, 40, 41, 48, 49, 54, 63, and 67.
• Homework #41
  • Read Section 8.5.
  • Pages 829-831, do each of the following exercises: #1, 3, 7, 8, 12, 18, 20, 26, 27, 31, 32, 34, 36, and 38.
• Homework #42
  • Read Section 8.6.
  • Pages 841-843, do each of the following exercises: #3, 8, 12, 16, 17, 21, 24, 27, 28, 32, 33, 34, 35, 40, 41, and 42.
• Homework #43
  • Read Section 8.7.
  • Pages 857-859, do each of the following exercises: #1, 2, 6, 7, 10, 16, 19, 24, 26, and 29.

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