## Calculus with Applications (10th Edition)

Published by Pearson

# Chapter R - Algebra Reference - R.5 Inequalities - R.5 Exercises - Page R-21: 8

#### Answer

$4\leq x<10$

#### Work Step by Step

This is a half-open interval (one endpoint included, the other excluded). The left endpoint, 4 is included in the interval, while the right endpoint, 10, is not.. $($9.99, 9.9999, 9.9999999 etc. are in the interval, but 10 itself is not) So if x is a number in this interval, it will be between 4 and 10 , with the possibility of being 4 or greater and less than ten (but not equal to ten). . We can write this as $4\leq x<10$

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