Answer
Center: $(0,8)$; Radius: $r=9$
Work Step by Step
Equation of a circle:
$(x-h)^2+(y-k)^2=r^2~~ $ (standard form)
Center: $(h,k)$; Radius: $r$
$x^2+(y-8)^2=81$
$(x-0)^2+(y-8)^2=9^2$
$h=0$, $k=8$, $r=9$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 1 - Review Exercises - Page 152: 16
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