Answer
$d=6.5$
Work Step by Step
Use the distance formula:
$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2+(z_2-z_1)^2}$
$d=\sqrt{(-2-2)^2+(4-3)^2+(9-4)^2}$
$d=\sqrt{(-4)^2+(1)^2+(5)^2}$
$d=\sqrt{16+1+25}$
$d=\sqrt{42}$
$d\approx6.5$
Geometry: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281159
ISBN 13:
978-0-13328-115-6
Chapter 1 - Tools of Geometry - 1-7 Midpoint and Distance in the Coordinate Plane - Practice and Problem-Solving Exercises - Page 56: 60
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