The concentration (in milligrams/cubic centimeter) of a certain drug in a patient's body t hr after injection is given by
?
.
?
When is the concentration of the drug increasing, and when is it decreasing?
?
A. Increasing on 
, decreasing on 
B. Increasing on 
, decreasing on 
C. Increasing on 
, decreasing on 
D. Increasing on 
, decreasing on 
E. Increasing on 
, decreasing on 
Answer: B
Mathematics
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Solve for the specified variable.RI = kE, for R
A. 
B. R = kEI
C. R = kE - I
D. R = 
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Convert the measurement as indicated. Round to the nearest tenth, if necessary.407 mi to kilometers
A. 385.0 km B. 431.4 km C. 655.3 km D. 252.7 km
Mathematics
Write true or false for the statement.1 meter = 0.01 centimeter
A. True B. False
Mathematics
Decide whether the pair of lines is parallel, perpendicular, or neither.x = 4y = -2
A. parallel B. perpendicular C. neither
Mathematics