Answer
The sign costs $450.
Work Step by Step
The area of a triangle is $\frac{1}{2}bh$.
$A=\frac{1}{2}(3\ ft)(2.5\ ft)=3.75\ ft^2$
$Cost=120\frac{dollars}{ft^2}\times3.75\ ft^2=450 dollars$
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 1 - Introduction to Algebraic Expressions - 1.1 Introduction to Algebra - 1.1 Exercise Set - Page 11: 81
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