Solutions to Odd-Numbered Exercises
1. Physical behavior should be periodic, or cyclical.
3. Since cumulative rainfall is always increasing, a sinusoidal function would not be ideal here.
5.
7.
9.
11.
13.
15. Answers will vary. Sample answer: This function could model temperature changes over the course of one very hot day in Phoenix, Arizona.
17. 9 years from now
19.
21. hours
23. 4:30
25. From July 8 to October 23
27. From day 19 through day 40
29. Floods: July 24 through October 7. Droughts: February 4 through March 27
31. Amplitude: 11, period: , frequency: 6 Hz
33. Amplitude: 5, period: , frequency: 30 Hz
35.
37.
39.
41.
43. years
45. 17.8 seconds
47. Spring 2 comes to rest first after 8.0 seconds.
49. 500 miles, at
51.
53.
Candela Citations
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- Precalculus. Authored by: OpenStax College. Provided by: OpenStax. Located at: http://cnx.org/contents/fd53eae1-fa23-47c7-bb1b-972349835c3c@5.175:1/Preface. License: CC BY: Attribution