Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 5 - Number Theory and the Real Number System - 5.2 The Integers; Order of Operations - Exercise Set 5.2: 123

Answer

$16$ years

Work Step by Step

A person who has a blood relative 95 or older will stretch his/her lifespan by 10 years. The number that represents this is $10$. A person who has less than 12 years of education shrinks his/her lifespan by 6 years. The number that represents this is $-6$. Thus, the difference between the lifespan of the two is: $=10 - (-6) = 10+6=16$
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