Answer
$c=8$
Work Step by Step
$c^2=a^2-b^2$
$c^2=81-17$
$c^2=64$
$c=8$
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 10 - Section 10.2 - The Ellipse and the Hyperbola - Exercise Set - Page 618: 63e
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