Intermediate Algebra (12th Edition)

Published by Pearson
ISBN 10: 0321969359
ISBN 13: 978-0-32196-935-4

Chapter R - Section R.3 - Exponents, Roots, and Order of Operations - R.3 Exercises - Page 31: 99



Work Step by Step

We are given the formula: $BAC=number~of~oz\times\%~alcohol\times 0.075\div body~weight~in~lb-hr~of~drinking~\times 0.015$ We plug in the values given: $=36\times 4.0\times 0.075\div 135-3\times 0.015$ We solve using the order of operations: $=36\times 4.0\times 0.075\div 135-3\times 0.015$ First multiply: $=144\times 0.075\div 135-3\times 0.015$ Multiply again: $=10.8\div 135-3\times 0.015$ Divide: $=0.08-3\times 0.015$ Multiply: $=0.08-0.015$ And subtract: $=0.035$
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