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 function, f(x) = -x4 + 9x3 - 29x2 + 45x. How many hours after the drug is administered will it be eliminated from the bloodstream.
A. 5 hours
B. 4 hours
C. 9 hours
D. 14 hours
Answer: A
Mathematics
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Find the length of the curve.x = 
+ 
from y = 1 to y = 3
A. 
B. 
C. 
D. 
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Express the rational number as a terminating or repeating decimal number.
A. 0.
B. 0.
C. 0.
D. 0.7
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Solve.It takes 9 hours for 6 people to paint a house. How long will it take 2 people to do the job?
A. 29.7 hr B. 3 hr C. 2.9 hr D. 27 hr
Mathematics
Provide an appropriate response.How many of the following are true?I. src="https://sciemce.com/media/4/ppg__rr0616191134__f1q185g7.jpg" style="vertical-align: -21.0px;" /> = 
= 
II.
= 2 + 3III.
= 
IV.
- 
A. None of them
B. Exactly one of them
C. Exactly two of them
D. Exactly three of them
E. all of them
Mathematics