The percentage of alcohol in a person's bloodstream t hr after drinking 8 fluid oz of whiskey is given by the function below. A(t) = 0.22te−0.3t     (0 ≤ t ≤ 12)

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
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Chapter3: Functions And Graphs
Section3.3: Lines
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Blood Alcohol Level

 The percentage of alcohol in a person's bloodstream t hr after drinking 8 fluid oz of whiskey is given by the function below.
A(t) = 0.22te−0.3t     (0 ≤ t ≤ 12)
 
At how long (in hr) after drinking the alcohol is the percentage of alcohol in the person's bloodstream at its highest level? (Round your answer to two decimal places.)
t =____________________  hr
 
What is the level (in %)? (Round your answer to three decimal places.)
_________________  %
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