Mathematics for Elementary Teachers with Activities, Loose-Leaf Version Plus MyLab Math -- Access Card Package (5th Edition)
5th Edition
ISBN: 9780134800196
Author: Sybilla Beckmann
Publisher: PEARSON
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Chapter 7.6, Problem 26P
* In 2000, Washington County had a total population—urban and rural populations combined—of 200,000. From 2000 to 2010, the rural population of Washington County went up by 4%, and the urban population of Washington County went up by 8%.
a. Based on the preceding information, make a reasonable guess for the percent increase of the total population of Washington County from 2000 to 2010. Based on your guess, what do you expect the total population of Washington County to have been in 2010?
b. Make up three very different examples for the rural and urban populations of Washington County in 2000 (i.e., pick pairs of numbers that add to 200,000). For each example, calculate the total population in 2010, and calculate the percent increase in the total population of Washington County from 2000 to 2010. Compare these answers with your answers in part (a).
c. If you had only the data given at the beginning of the problem (the 4% and 8% increases and the total population of Washington County in 2010? In other words, could you say that the total population must have been between certain numbers in 2010? If so, what is this range of numbers?
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Chapter 7 Solutions
Mathematics for Elementary Teachers with Activities, Loose-Leaf Version Plus MyLab Math -- Access Card Package (5th Edition)
Ch. 7.1 - Use the multiple-batches perspective to discuss...Ch. 7.1 - Use the variable-parts perspective to discuss and...Ch. 7.1 - John is driving at a constant speed of 10 miles...Ch. 7.1 - You can make grape juice by mixing 1 can of frozen...Ch. 7.1 - Use ratio tables to determine in two ways which of...Ch. 7.1 - Explain how to reason about ratio tables to...Ch. 7.1 - Allie, Benton, and Cathy are planning to mix red...Ch. 7.1 - Company A charges $6 for every 100 silly bands....Ch. 7.1 - You can make a pink paint by mixing 212 cups white...Ch. 7.2 - Walking at a constant speed, a person walks 34 of...
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