Determine what signs on values of x and y would make the statement true. Assume that x and y are not 0.
-The Blood Alcohol Concentration (BAC) of a person who has been drinking is given by the expression $$\text { number of } \mathrm { oz } \times \% \text { alcohol } \times .075 \div \text { body weight in } \mathrm { lb } \text { - hours of drinking } \times .015 \text {. }$$ Find the BAC to the nearest thousandth for a 174-lb woman, who, in 3 hours, has drunk 4 16-oz beers (64 oz), each having a 3.2% alcohol content.
A) -0.207
B) 0.043
C) -199.912
D) -0.023

Question

Quizplus · Accepted Answer

The BAC is calculated using the given formula: $$BAC = \frac{\text{number of oz} \times \% \text{ alcohol} \times .075}{\text{body weight in lb}} - \text{hours of drinking} \times .015.$$ Substituting the given values: $$BAC = \frac{64 \times 0.032 \times .075}{174} - 3 \times .015 = 0.043.$$ This calculation results in a positive BAC of 0.043 to the nearest thousandth.

Determine What Signs on Values of X and Y Would