## Thinking Mathematically (6th Edition)

Published by Pearson

# Chapter 5 - Number Theory and the Real Number System - 5.2 The Integers; Order of Operations - Exercise Set 5.2: 125

#### Answer

$1$ year

#### Work Step by Step

A person who frequently feels stretched will shrink his/her lifespan by 5 years. The number that represents this is $-5$. 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: $=-5 - (-6) = -5+6=1$ year

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