Without using a calculator, give the exact trigonometric function value with rational denominator.cos 
A. 
B. 
C. 
D. 
Answer: A
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Refer to a normal distribution described by the following figure. The mean is ? and the standard deviation is ?.
Approximately 84% of the data lies below
A. 130. B. 210. C. 154. D. 112. E. none of these
Find the voltage gain of an amplifier whose Vin = 0.5 V and VO = 26.1.
a. 1.72 dB b. 26.1 dB c. 34.4 dB d. 40.2 dB e. 50.5 dB
Simplify the expression. Assume all variables represent positive real numbers.
A. 
B. 
C. 3
D. 3
Find the center, foci, and vertices of the ellipse.
+ 
= 1
A. center at (0, 0)
foci at (0, - 
) and (0, 
)
vertices at (0, -4), (0, 4)
B. center at (0, 0)
foci at (0, -4) and (0, 4)
vertices at (0, -16), (0, 16)
C. center at (0, 0)
foci at (0, 4) and (3, 0)
vertices at (0, 16), (9, 0)
D. center at (0, 0)
foci at (- 
, 0) and (
, 0)
vertices at (-4, 0), (4, 0)