Express in terms of i.4 - 
A. -4 + 4i
B. 4 + 4i
C. 4 - 4i
D. 4 + 4
Answer: C
Mathematics
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An x-ray is done for a time of 2.5s with a current setting of 60mA. If the time is reduced to 1s, what should the current setting be if the distances all remain the same?
A. 2.4mA B. 45mA C. 120mA D. 150mA
Mathematics
Add or subtract. Simplify your answer to lowest terms.
- 
A. 
B. 
C. 
D. 
Mathematics
Use the given functions to find the requested function.f(x) = 3x + 6, g(x) = 6x + 7Find fg.
A. 9x2 + 57x + 13 B. 18x2 + 57x + 42 C. 18x2 + 43x + 42 D. 18x2 + 42
Mathematics
Solve the problem.Suppose that y is inversely proportional to x and that y = 3.5 when x = 7. Find the constant of proportionality k. Then use y = 
to find y when x = 10.
A. k = 4.9; y = 
B. k = 0.5; y = 5
C. k = 24.5; y = 
D. k = 9.8; y = 
Mathematics