Answer
$5$ units
Work Step by Step
Use the distance formula $d=\sqrt{(x_1-x_2)^2+(y_1-y_2)^2}$ to obtain:
$d=\sqrt{(5-8)^2+(1-5)^2}
\\d=\sqrt{(-3)^2+(-4)^2}
\\d=\sqrt{9+16}
\\d=\sqrt{25}
\\d=5$
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 1 - Section 1.9 - Distance and Midpoint Formulas; Circles - Exercise Set - Page 280: 2
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