Prealgebra (7th Edition)

Published by Pearson
ISBN 10: 0321955048
ISBN 13: 978-0-32195-504-3

Chapter 6 - Review: 29

Answer

8 bags are needed.

Work Step by Step

$area=180\ ft\times175\ ft=31500\ sqft$ $\frac{1\ bag}{4000\ sqft}=\frac{x\ bag}{31500 \ sqft}$ Use cross multiplication to solve for x. $4000x=1\times31500$ $4000x\div4000=31500\div4000$ $x=7.875$
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