College Algebra (11th Edition)

Published by Pearson
ISBN 10: 0321671791
ISBN 13: 978-0-32167-179-0

Chapter R - Section R.2 - Real Numbers and Their Properties - R.2 Exercises: 118

Answer

$0.035$

Work Step by Step

We will use the following formula for the blood alcohol concentration (BAC) of a person who has been drinking. BAC = (number of oz)(% alcohol)(0.075) / (body weight in lb) - (hr of drinking)(0.015). We are to determine the BAC for a 135 lb woman who has ingested three 12-oz-beers (36 oz) each having 4% alcohol, in 2 hours. Estimate to the nearest thousandth. Number of oz = 36 % alcohol = 4 body weight = 135 hr of drinking = 3 We will use the formula: $BAC=(36)(4)(0.075)\div(135)-(3)(0.015)$ $=10.8\div135-3(0.015)$ $=0.008-0.045$ Therefore, the BAC of the person is: $BAC=0.008-0.045=0.035$
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