Answer
See below
Work Step by Step
We found in part b the formula $a_n=36.5\times1.22(n-1)$
The radius for the 8th lane is $a_8=36.5\times1.22(8-1)=45.04$
Since $45.04 \lt 50$, the running track meets requirements.
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 12 Sequences and Series - Standardized Test Practice - Extended Response - Page 847: 19c
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