Environmental Science for AP* (2nd Edition)

Published by W. H. Freeman
ISBN 10: 1464108684
ISBN 13: 978-1-46410-868-6

Chapter 9 - Module 28 - Human Use of Water Now and in the Future - AP Review Questions - Page 315: 3

Answer

8 years

Work Step by Step

if a washer is 400 dollars extra for water efficiency and saves you 100L per load and water costs $5 per 1000L and you do 100L per year it will take you 8 years to save the extra money that you spent on the washer
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