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# Using and Understanding Mathematics A Quantitative Reasoning Approach

**by**Bennett, Jeffrey O.; Briggs, Bill

### 9780321652799

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## Summary

**Using and Understanding Mathematics: A Quantitative Reasoning Approach** increases students' mathematical literacy so that they better understand the mathematics used in their daily lives.

Ideal for courses that emphasize quantitative reasoning, **Bennett** and **Briggs** prepare students to use math effectively to make better decisions throughout their lives. Contents are organized with that in mind, with engaging coverage in sections like **Taking Control of Your Finances, Dividing the Political Pie**, and a full chapter about Mathematics and the Arts.

This **Fifth Edition** offers new hands-on Activities for use with students in class, new ways for students to check their understanding through Quick Quizzes, and a new question type in MyMathLab that applies math to recent events in the news. In addition, the authors increase their coverage of consumer math, and provide a stronger emphasis on technology through new **Using Technology** features and exercises. The new Insider's Guide provides instructors with tips and ideas for effective use of the text in teaching the course.

The real-world focus turns students’ attention to the math they will need for their daily lives, and keeps them engaged during the course. A wide range of exercises and problem types end each unit, making it easy for instructors to create assignments to fit their course goals.

## Author Biography

**Jeffrey Bennett** specializes in mathematics and science education. He has taught at every level from pre-school through graduate school, including more than 50 college courses in mathematics, physics, astronomy, and education. His work on *Using and Understanding Mathematics* began in 1987, when he helped create a new mathematics course for the University of Colorado’s core curriculum. Variations on this course, with its quantitative reasoning approach, are now taught at hundreds of colleges nationwide. In addition to his work in mathematics, Dr. Bennett (whose PhD is in astrophysics) has written leading college-level textbooks in astronomy, statistics, and the new science of astrobiology, as well as books for the general public. He also proposed and developed both the Colorado Scale Model Solar System on the University of Colorado at Boulder campus and the Voyage Scale Model Solar System, a permanent, outdoor exhibit on the National Mall in Washington, DC. He has recently begun writing science books for children, including the award-winning *Max Goes to the Moon and Max Goes to Mars*. When not working, he enjoys swimming as well as hiking the trails of Boulder, Colorado with his family.

**William L. Briggs** has been on the mathematics faculty at the University of Colorado at Denver for 22 years. He teaches numerous courses within the undergraduate and graduate curriculum, and has special interest in teaching calculus, differential equations, and mathematical modeling. He developed the quantitative reasoning course for liberal arts students at University of Colorado at Denver supported by his textbook Using and Understanding Mathematics. He has written two other tutorial monographs, *The Multigrid Tutorial and The DFT: An Owner's Manual for the Discrete Fourier Transform*, as well as *Ants, Bikes, Clocks*, a mathematical problem solving text for undergraduates. He is a University of Colorado President's Teaching Scholar, an Outstanding Teacher awardee of the Rocky Mountain Section of the MAA, and the recipient of a Fulbright Fellowship to Ireland. Bill lives with his wife, Julie, and their Gordon setter, Seamus, in Boulder, Colorado. He loves to bake bread, run trails, and rock climb in the mountains near his home.

## Table of Contents

Preface

Prologue: Literacy for the Modern World

** Part 1 Logic and Problem Solving **

**Chapter 1 Thinking Critically**

1A Recognizing Fallacies

1B Propositions and Truth Values

1C Sets and Venn Diagrams

1D Analyzing Arguments

1E Critical Thinking in Everyday Life

**Chapter 2 Approaches to Problem Solving**

2A The Problem-Solving Power of Units

2B Standardized Units: More Problem-Solving Power

2C Problem-Solving Guidelines and Hints

** Part 2 Quantitative Information in Everyday Life **

**Chapter 3 Numbers in the Real World**

3A Uses and Abuses of Percentages

3B Putting Numbers in Perspective

3C Dealing with Uncertainty

3D Index Numbers: The CPI and Beyond

3E How Numbers Deceive: Polygraphs, Mammograms, and More

**Chapter 4 Managing Money**

4A Taking Control of Your Finances

4B The Power of Compounding

4C Savings Plans and Investments

4D Loan Payments, Credit Cards, and Mortgages

4E Income Taxes

4F Understanding the Federal Budget

** Part 3 Probability and Statistics **

**Chapter 5 Statistical Reasoning**

5A Fundamentals of Statistics

5B Should You Believe a Statistical Study?

5C Statistical Tables and Graphs

5D Graphics in the Media

5E Correlation and Causality

**Chapter 6 Putting Statistics to Work**

6A Characterizing Data

6B Measures of Variation

6C The Normal Distribution

6D Statistical Inference

**Chapter 7 Probability: Living with the Odds**

7A Fundamentals of Probability

7B Combining Probabilities

7C The Law of Large Numbers

7D Assessing Risk

7E Counting and Probability

** Part 4 Modeling **

**Chapter 8 Exponential Astonishment**

8A Growth: Linear versus Exponential

8B Doubling Time and Half-Life

8C Real Population Growth

8D Logarithmic Scales: Earthquakes, Sounds, and Acids

**Chapter 9 Modeling Our World**

9A Functions: The Building Blocks of Mathematical Models

9B Linear Modeling

9C Exponential Modeling

**Chapter 10 Modeling with Geometry**

10A Fundamentals of Geometry

10B Problem Solving with Geometry

10C Fractal Geometry

** Part 5 Further Applications **

**Chapter 11 Mathematics and the Arts**

11A Mathematics and Music

11B Perspective and Symmetry

11C Proportion and the Golden Ratio

**Chapter 12 Mathematics and Politics**

12A Voting: Does the Majority Always Rule?

12B Theory of Voting

12C Apportionment: The House of Representatives and Beyond

12D Dividing the Political Pie

Credits

Answers

Index