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 = 3.65 minutes after the injection is given
B. t = 4 minutes after the injection is given
C. at the time of injection
D. t = 0.55 minutes after the injection is given
Answer: D
Mathematics
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Graph the function.
A. 
B. 
C. 
D. 
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Write the word statement as an equation. Use x to represent the unknown number. Do not solve.The sum of twice a number and 9 is 17.
A. 2(x + 9) = 17 B. x + 18 = 17 C. 2x + 9 = 17 D. 18x = 17
Mathematics
Without graphing the function, determine its amplitude or period as requested.y = 4 sin xFind the amplitude.
A. 5
B. 
C. -5?
D. 2?
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Find the common ratio, r, for the given geometric sequence.125, 25, 5, 1, . . .
A. 
B. 5
C. 
D. 
Mathematics