By James Stewart, Lothar Redlin, Saleem Watson, Phyllis Panman

ISBN-10: 0495387894

ISBN-13: 9780495387893

This article bridges the distance among conventional and reform methods to algebra encouraging scholars to work out arithmetic in context. It offers fewer themes in larger intensity, prioritizing info research as a beginning for mathematical modeling, and emphasizing the verbal, numerical, graphical and symbolic representations of mathematical options in addition to connecting arithmetic to genuine lifestyles occasions drawn from the scholars' majors

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**Additional info for College Algebra: Concepts and Contexts**

**Example text**

Our goal is to use the model to predict the pressure at depths that are not in the data. The pressure-depth data and model are given below. 45d contains all the data and more. For instance, we can use this equation to predict the pressure at a depth of 200 ft, a value that is not available from the data. 2 ? 45d Using the model In this section we learn how to make such models for data. The depth-pressure model is obtained in Example 3. 2 ■ Making a Linear Model from Data A model is a mathematical representation (such as an equation) of a real-world situation.

Using the model, we find that 12 sheep have L = 4 * legs. = ٗ ٗ 4. Suppose digital cable service costs $49 a month with an initial installation fee of $110. We make a linear model for the total cost C of digital cable service for x months by writing the equation ______________. Think About It 5. What is the purpose of making a model? Support your answer by examples. 6. Explain how data, equations, and graphs work together to describe a real-world situation. Give an example of a real-world situation that can be described in these three ways.

The list below shows the Apgar scores of babies born in Memorial Hospital on March 11, 2007. What are the average and the median Apgar scores for these babies? 9, 8, 10, 3, 5, 8, 10 18. Weights of Sextuplets The Hanselman sextuplets were born three months premature on February 26, 2004, in Akron, Ohio, and they have all survived to this date. The list below shows the birth weights of each child in pounds. What are the average and the median birth weights of these sextuplets? 0625 19. Quiz Average The table below shows Jordan’s scores on her first five algebra quizzes.

### College Algebra: Concepts and Contexts by James Stewart, Lothar Redlin, Saleem Watson, Phyllis Panman

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