In a Suspension Bridge, the Shape of the Suspension Cables

question 69

Multiple Choice

In a suspension bridge, the shape of the suspension cables is parabolic. The bridge shown in the figure has towers that are 500 m apart, and the lowest point of the suspension cables is 120 m below the top of the towers, as shown below. Find a quadratic function that models the parabolic part of the cables, placing the origin of the coordinate axes at the vertex.

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