Determine the center (or vertex if the curve is a parabola) of the given curve.x2 + 8x - 4y + 8 = 0
A. (-2, -4)
B. (2, 4)
C. (-4, -2)
D. (4, 2)
Answer: C
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The probability of a radar station detecting an enemy plane is 0.55. If 100 stations are in use, what is the expected number of stations that will detect an enemy plane?
A. 100 B. 55 C. 0 D. 98 E. none of these choices
Use the limit comparison test to determine if the series converges or diverges.
A. Converges B. Diverges
Answer the question.A small company allows its employees to use "flex-time" to decide whether to work 
or 
Of its 57 employees, 17 choose to work 
17 are parents with small children who choose to work 
and 23 are students
who work 
after school and on Sundays. Which measure of central tendency would be best to use to determine the average number of employees?
A. Median
B. Mode
C. Weighted mean
D. Mean
Factor the expression completely, if possible.4x2 - 169y2
A. (2x + 13y)(2x - 13y) B. (2x + 13)(2x - 13) C. (2x + 13y)2 D. (2x - 13y)2