Answer:
9
Step-by-step explanation:
Let the equation of a parabola be
= 4ax.
Then , focal length of the parabola is a.
As , (0,0) is the vertex and its focus is (a,0)
Thus, focal length comes out to be a.
Here,
a is given as 9 units .
Thus focal length of the parabola, d, equals to 9 units
Answer:
Step-by-step explanation:
X = 90°
Step-by-step explanation:
y-intercept = 2
x-intercept= 2.5
Vertex= 1,4
y=mx+b
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2.5 * 3.5 = 8.75 or 8 3/4 inches long