Final answer:
Measuring the amount of alcohol in a mixed drink is important for moderation, determining blood alcohol concentration, and understanding the effects of alcohol intoxication.
Step-by-step explanation:
Measuring the amount of alcohol in a mixed drink is important for several reasons. Firstly, it helps ensure that the drinker is consuming alcohol in moderation, which is defined as up to one drink per day for women and up to two drinks per day for men. Secondly, measuring the amount of alcohol can help determine the drinker's blood alcohol concentration (BAC), which varies for each individual based on factors such as age, sex, and overall health. Finally, accurate measurement allows for better understanding of the effects of alcohol intoxication and helps identify risk factors.