Divide.
A. 2 - i
B. 2i
C. i - 2
D. -2i
Answer: D
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State the slope of the graph of f.f(x) = 
x + 2
A. 
B. 2
C. 
D. 0
Find the exact value by using a half-angle identity.tan 
A. -1 + 
B. 1 + 
C. -1 - 
D. 1 - 
Solve the problem.Two recording devices are set 3200 feet apart, with the device at point A to the west of the device at point B. At a point on a line between the devices, 400 feet from point B, a small amount of explosive is detonated. The recording devices record the time the sound reaches each one. How far directly north of site B should a second explosion be done so that the measured time difference recorded by the devices is the same as that for the first detonation?
A. 933.33 feet B. 1763.83 feet C. 4098.78 feet D. 1549.19 feet
Find f'(x) at the given value of x.f(x) = 
; Find f'(4).
A. 
B. 
C. 
D. 