Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 1 - Whole Numbers - 1.9 Reading Pictographs, Bar Graphs and Line Graphs - 1.9 Exercises - Page 88: 20

Answer

1500

Work Step by Step

In 2012 there were 4000 installations. In 2013 there were 2500 installations. The decrease is 4000 - 2500 = 1500.
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