Concept explainers
To find: solution of the problem by using estimation.
Answer to Problem 7.3P
The number of Americans checked their e-mail daily is
Explanation of Solution
Given information:
The given percentage of all Americans had at least one e-mail account in 2007 is
The total Americans are
Simplify as,
The given percentage of all Americans had at least one e-mail account in 2007 is
The total Americans are
The number of Americans who had e-mail account is calculated as
The given percentage of the Americans who checked their e-mail daily is
The number of Americans who checked their e-mail daily is calculated as,
Thus, the number of Americans who checked their e-mail daily is
Chapter PS Solutions
Algebra 2
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