Answer
$1470$ seats
Work Step by Step
We need to use the formula $ a_n =a_1+(n-1) d $
Here, $ a_1=25$ and $ d=1$
Now, $ S_n=\dfrac{n(a_1+a_n)}{2}$
Now, $ S_{35}=\dfrac{35(25+59)}{2}=1470$ seats
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 10 - Review Exercises - Page 1124: 30
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