Solve.The concentration of a particular medication, in parts per million, after time t, in hours, is given by the polynomial 
. Find the concentration after 20 hours.
A. 96 parts per million
B. -12 parts per million
C. 84.36 parts per million
D. 72 parts per million
Answer: D
Mathematics
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- 
= 
A. {-1} B. {1} C. {-2} D. {2}
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