Answer:
Step-by-step explanation:
The directrix is a vertical line, so the parabola is horizontal. The focus lies to the left of the directrix, so the parabola opens to the left.
For a left-opening parabola:
x = a(y-k)²+h,
a < 0,
vertex (h,k)
focal length p = 1/|4a|
focus (h-p, k)
directrix: x=h+p
Apply your data
focus (1,-4)
directrix x=2
vertex (1.5,-4).
focal length p = 0.5
a = -1/|4p| = -½
x = -½(y-2)²+ ½
The correct answer is choice d.....
The Circumference would be 1256.637 and the diameter would be 400
Answer:
I think the answers are 9 and 18.
Step-by-step explanation:
i think this because 3 x 3 is 9 and 9 x 2 = 18 then add another 9 to get 27.
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1,111... = 1 + 1/9 = 1 1/9
