Approximately how long does it take to eliminate all alcohol from a body with a BAC of 0.05?

When a person has a blood alcohol concentration (BAC) of 0.05, the body metabolizes and eliminates alcohol at an average rate of approximately 0.015 BAC per hour. To calculate the approximate time it takes to eliminate a BAC of 0.05, you divide the BAC level by the rate of elimination.

For a BAC of 0.05, it would take roughly:

0.05 BAC ÷ 0.015 BAC/hour = approximately 3.33 hours.

This rounds to about 3.5 to 4 hours, which aligns with the provided option. Understanding this concept is essential because it highlights how long it usually takes for the body to process alcohol, informing safe driving decisions among individuals who consume alcohol. Recognizing these factors can prevent impaired driving, as it provides insight into the time needed for alcohol to leave the system before getting behind the wheel.