The average blood alcohol concentration BAC of eight male subjects was measured after consumption of 15 mL of ethanol corresponding to one alcoholic drink The resulting data were used to model th concentration function C t 0 00225te 0 0467t where t is measured in minutes after consumption and C is measured in g dL Round your answers to six decimal places a How rapidly was the BAC increasing in g dL min after 4 minutes g dL min Interpret your answer in the context of this problem The model predicts that the BAC will be Select by this approximate amount after b How rapidly was it decreasing in g dL min half an hour later g dL min Interpret your answer in the context of this problem minutes