Geometry: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281159
ISBN 13: 978-0-13328-115-6

Chapter 12 - Circles - 12-1 Tangent Lines - Practice and Problem-Solving Exercises - Page 767: 11



Work Step by Step

Applying the Pythagorean Theorem: $$ 6400^2+d^2=\left(6400+2.5\right)^2 \\ 40960000+d^2=40992006.25 \\ d^2=32006.25 \\ d=179 km$$
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