Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 8 - Geometry - 8.4 Parallelograms and Trapezoids - 8.4 Exercises: 20

Answer

Cost per square foot = \$1.60

Work Step by Step

We must first determine the area of the office space. Area of a Trapezoid = $A$ = $\frac{1}{2}$$h$($b$ + $B$) Therefore: $A$ = $\frac{1}{2}$(20 ft)(20 ft + 32 ft) $A$ = $\frac{1}{2}$(20 ft)(52 ft) $A$ = (10 ft)(52 ft) $A$ = 520 ft$^{2}$ Next, to get the cost per square foot we simply divide the total cost by the number of square feet. Therefore: Cost = \$832 / 520 Cost = \$1.60
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