Answer the following questions about driving risk associated with drinking and blood-alcohol concentrations:

a) Randy is just barely legally intoxicated. How much more likely is he to have an accident than someone who is sober?

b) Marissa, who has been drinking, is fifteen times as likely to have an accident as her sober friend, Christine. What is Marissa’s approximate blood-alcohol concentration?

c) After several drinks, Charles is ten times as likely to have an accident as a sober person. Is he more or less intoxicated than James, whose blood alcohol level is 0.10?

d) Under the original blood-alcohol standards recommended by the National Highway Traffic Safety Administration, a person considered just barely legally intoxicated was how much more likely to have an accident than a sober individual?