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Blood Alcohol Level The percentage of alcohol in a person's bloodstream t hr after drinking 8 fluid 02 of whiskey is given by A(t) = 0.23re-0-4t (o s r s 12).T (a) What is the percentage of alcohol in a person's bloodstream after % hr? (Round your answers to three decimal places.) :l After 10 hr? :l (b) How fast is the percentage of alcohol in a person's bloodstream changing after % hr? (Round your answers to three decimal places.) l:l After 10 hr? l:l