Answer
83
Work Step by Step
Putting this in vertex form,
$$-20(t-2)^2+83$$
Since a square is nonnegative,
the maximum value is $\boxed{83}$
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter 3, Polynomial and Rational Functions - Section 3.1 - Quadratic Functions and Models - 3.1 Exercises - Page 288: 37
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