## Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson

# Appendix A - Review - A.1 Algebra Essentials - A.1 Assess Your Understanding - Page A11: 44

#### Answer

$3$

#### Work Step by Step

If the coordinates of $M$ and $N$ are $x$ and $y$, respectively, then $\mathrm{d}(\mathrm{M},\mathrm{N})=|\mathrm{y}-\mathrm{x}|$. Thus, $d(C,A)=|-3-0|=|-3|=3$

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