Question

a man who weighs approximately 140 pounds has two,12 ounce beers and one 1 1/2 oz. shots of liquor in one hour. what is his estimated BAC?

Answer 1

The correct answer is:

0.08.

Explanation:

To calculate the BAC, we first find the amount of alcohol (in grams) of the drinks.  In the US, a standard drink has 14 g of alcohol.  The man has 2 beers and 1 shot; this is 3 standard drinks:
3*14 = 42

This has 42 g of alcohol.

Next we convert the weight in pounds to grams.  We do this by multiplying by 454:
140*454 = 63560

Next we multiply by the gender constant.  For men, this is 0.68:
63560(0.68) = 43220.8

We divide the grams of alcohol by this number:
42/43220.8 = 0.000972

Multiply this by 100:
0.000972(100) = 0.0972

This is the BAC right after drinking.  To account for the time that has passed, we multiply the number of hours by 0.015:
1(0.015) = 0.015

We subtract this from our immediate BAC:
0.0972-0.015 = 0.0822 ≈ 0.08

Answer 2

Around .8 B.A.C because if you look at scales online a 12 ounce beer is one drink and a 1 1/2 oz. shot is another full drinks. So that's 3 drinks which means its around a .8 for a 140 pound man.