Write the expression in the standard form a + bi.
3
A. 4
- 4
i
B. 4 - 4
i
C. -4
+ 4
i
D. -4
- 4
i
Answer: A
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Provide an appropriate response.The most recently purchased goods are assumed to be sold first with the FIFO method.
A. True B. False
Solve the problem.Suppose, for a certain drug, the following results were obtained: Immediately after the drug was administered, the concentration was 4 milligrams per milliliter. Twelve hours later, the concentration had dropped to 1.6 milligrams per milliliter. The concentration decays exponentially according to the law 
Determine the value of k for this drug.
A. k = 0.0764 B. k = -1.4100 C. k = -0.0764 D. k = -0.0098
Write the first five terms of the geometric sequence with the given information.an = 7an-1; a1 = 4
A. 28, 196, 1372, 9604, 67,228 B. 4, 28, 196, 1372, 9604 C. 4, 11, 18, 25, 32 D. 7, 28, 196, 1372, 9604
Use a sum or difference identity to find the exact value.tan 345°
A. - 
+ 2
B. - 
- 2
C. 
- 2
D. 
+ 2