Solve the problem.The concentration, in parts per million, of a particular drug in a patient's blood x hours after the drug is administered is given by the functionf(x) = -x4 + 12x3 - 39x2 + 56xHow many hours after the drug is administered will it be eliminated from the bloodstream.
A. 7 hours
B. 15 hours
C. 8 hours
D. 6 hours
Answer: C
Mathematics
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Find the volume of the indicated region.the region that lies under the plane 
and over the triangle with vertices at 
, 
, and 
A. 6 B. 12 C. 10 D. 8
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Solve the problem.If tan ? = 3.8, find the value of tan ? + tan (? + ?) + tan (? + 2?).
A. 13.4 B. 11.4 + 3? C. 11.4 D. undefined
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Determine whether the partial fraction decomposition is correct by graphing the left side and the right side of the equation on the same coordinate system and observing whether the graphs coincide. (yes = coincide, no = does not coincide)
= 
+ 
A. No B. Yes
Mathematics
Sketch an angle ? in standard position such that ? has the smallest positive measure and the given point is on the terminal side of ?.(-2, 5) 
A. 
B. 
C. 
D. 
Mathematics