Find the focus and directrix of the parabola with the given equation.x2 = -16y
A. focus: (0, 4)
directrix: y = -4
B. focus: (0, -4)
directrix: y = 4
C. focus: (0, -4)
directrix: y = -4
D. focus: (-8, 0)
directrix: x = 4
Answer: B
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Find the infinite sum accurate to three decimal places.
A. 0.010 B. -0.007 C. -0.010 D. 0.007
Determine whether the statement is true or false.If f(x) is a polynomial having only real coefficients and 2 - 4i is a zero of f(x), then 2 + 4i is also a zero.
A. True B. False
Write the form of the partial fraction decomposition of the rational expression. It is not necessary to solve for the constants.
A. 
+ 
B. 
+ 
+ 
C. 
+ 
+ 
D. 
+ 
+ 
Find the standard form of the equation of the parabola using the information given.Vertex: (1, -7); Focus: (9, -7)
A. (y + 7)2 = 32(x - 1) B. (y + 7)2 = -32(x - 1) C. (x + 1)2 = 8(y - 7) D. (x + 1)2 = -8(y - 7)