Find the focus and directrix of the parabola.y2 = 16x
A. F: (4, 0); D: x = -4
B. F: (4, 0); D: x = 4
C. F: (0, 4); D: y = -4
D. F: (4, 4); D: x = 4
Answer: A
Mathematics
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?
?
A. 
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C. ?
D. ?
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