In The New Yorker on March 29, 2010 James Surowicki wrote that the 25 million iPhones Apple sold in 2009 represented 2.2 percent of world cell phone purchases.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter7: Percents
Section7.5: Percent Of Change
Problem 26E
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In The New Yorker on March 29, 2010 James Surowicki wrote that the 25 million iPhones Apple sold in 2009 represented 2.2 percent of world cell phone purchases.

  1. Use Surowicki’s numbers to estimate how many people bought a cell phone in 2009.

b. Estimate the percentage of the world population that bought a cell phone in 2009 

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But what if 6840 x 4% = 273.6?

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