Answer
478 thousand
Work Step by Step
$t=0.3x^2+12x+118=0.3(20^2)+12(20)+118=0.3(400)+240+118=120+358=478$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 10 - Section 10.1 - Adding and Subtracting Polynomials - Exercise Set - Page 705: 64
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