To determine which blood alcohol concentration (BAC) readings indicate impaired driving, you need to compare each reading to the standard legal limit for impaired driving. In many places, this limit is 0.08. Any BAC reading equal to or above this threshold indicates that a person's driving ability is impaired by alcohol.
Here are the given BAC readings:
1. 0.05: This is below the 0.08 limit, so it does not indicate impaired driving.
2. 0.5: This is significantly above the 0.08 limit, so it indicates impaired driving.
3. 0.15: This is also above the 0.08 limit, so it indicates impaired driving.
4. 0 (zero): This is below the 0.08 limit and indicates no presence of alcohol, hence does not indicate impaired driving.
Therefore, the BAC readings of 0.5 and 0.15 show that the individual's driving is impaired by alcohol. The correct answers are 0.5 and 0.15.
