Solve the problem.Suppose, for a certain drug, the following results were obtained: Immediately after the drug was administered, the concentration was 6 milligrams per milliliter. Nine hours later, the concentration had dropped to 1.4 milligrams per milliliter. The concentration decays exponentially according to the law 
Determine the value of k for this drug.
A. k = 0.1617
B. k = -0.0062
C. k = -0.5047
D. k = -0.1617
Answer: A
Mathematics
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Solve for x. Check your answer. If there is no solution, say so.
- 
= 2 - 
A. x = 
B. x = 
C. x = - 
D. No solution
Mathematics
Fill in the blank with one of the words or phrases listed below.
The 
is the basic unit of capacity in the metric system.
A. gram B. meter C. liter D. calorie
Mathematics
Write the decimal as a fraction or mixed number in lowest terms.38.12
A. 38
B. 3
C. 3812
D. 381
Mathematics
Multiply. Simplify, if possible.60 ? (-315)
A. -18,900 B. -18,960 C. 18,900 D. 18,960
Mathematics