Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 5 - Section 5.3 - Polynomials and Polynomial Functions - Exercise Set: 125c

Answer

$683.6$ billion dollars

Work Step by Step

We are given that $f(x)=.19x^{2}+5.67x+43.7$ can be used to approximate the amount of restaurant food-and-drink sales, where x is the number of years since 1970 and f(x) is the sales (in billions of dollars). To estimate the sales in 2015, we will use $x=45$, because 2015 is 45 years after 1970. $f(x)=.19(45)^{2}+5.67(45)+43.7=683.6$ billion dollars
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