Final answer:
In Wisconsin, the legal limit for OUI is a BAC of 0.08%. It takes approximately five hours for a person with this BAC level to metabolize the alcohol and achieve sobriety.
Step-by-step explanation:
The legal limit for Operating Under the Influence (OUI) in Wisconsin (WI) is a Blood Alcohol Concentration (BAC) of 0.08%. This limit is in place as higher levels of alcohol in the blood can lead to acute intoxication, unconsciousness, and even death. It's important to understand that alcohol metabolism rates vary, but typically, the human body breaks down alcohol at a rate of about 15 mg/dL per hour, which means it takes at least five hours for a person who is legally intoxicated to achieve sobriety.