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OpenStudy (anonymous):
A building has an entry the shape of a parabolic arch 22 ft high and 28 ft wide at the base as shown below. Find an equation for the parabola if the vertex is put at the origin of the coordinate system.
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OpenStudy (anonymous):
since it is symmetric about "y" axis and centered at origin and beolow the "x-axis", you can assume the equation is \[y=-ax^2\] using the diagram below, find "a" |dw:1365342252542:dw|
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