Solve the problem.The concentration of a drug in the bloodstream, measured in milligrams per liter, can be modeled by the function, 
where t is the number of minutes after injection of the drug. When will the drug be at its highest concentration? Approximate your answer rounded to two decimal places.
A. t = 4 minutes after the injection is given
B. t = 3.65 minutes after the injection is given
C. t = 0.55 minutes after the injection is given
D. at the time of injection
Answer: C
Mathematics
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Solve the inequality. Express your answer using interval notation.|5x + 2| > 3
A. 
B. (-?, -1) or 
C. (-?, -1] or 
D. 
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Find the exact value of the expression or state that it does not exist.tan-1 
A. 
B. - 
C. - 
D. 
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Determine which value(s), if any, must be excluded from the domain of the variable in the expression.
A. x = -3 B. x = 3 C. x = 0 D. none
Mathematics
Use possible symmetry to determine whether the graph is the graph of an even function, an odd function, or a function that is neither even nor odd.
A. Odd B. Neither C. Even
Mathematics