Income Suppose income from an endowment is generated at the annual rate of $42,000 per year. Find the capital value of this endo
1 answer:
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Solution:
Given:
Part A:
The vertex of an up-down facing parabola of the form;
Rewriting the equation given;
Therefore, the vertex is (0,0)
Part B:
A parabola is the locus of points such that the distance to a point (the focus) equals the distance to a line (directrix)
Using the standard equation of a parabola;
Rewriting the equation in standard form,
Since the parabola is symmetric around the y-axis, the focus is a distance p from the center (0,0)
Hence,
Therefore, the focus is;
Part C:
A parabola is the locus of points such that the distance to a point (the focus) equals the distance to a line (directrix)
Using the standard equation of a parabola;
Rewriting the equation in standard form,
Since the parabola is symmetric around the y-axis, the directrix is a line parallel to the x-axis at a distance p from the center (0,0).
Hence,
Therefore, the directrix is;
