This is only my 3rd post here I'm pretty sure. I want to say thanks again to those who helped me with my first post in the two questions I listed. I have another question on how to set up this word problem which is based off a parabola. I was told to that an x axis and y axis can be found after making a scetch of the bridge in the below problem but I couldnt understand how if the bridge is rectangular.
4) One section of a suspension bridge has its weight uniformly distributed between two towers that are 400 feet apart and rise 90 feet above the horizontal roadway (see figure). A cable strung between the tops of the towers has the shape of a parabola, and its center point is 10 feet above the roadway. Suppose coordinate axes are introduced as shown in the figure.
a) Find the equation for the parabola.
b) Nine equally spaced vertical cables are used to support the bridge. Find the total length of these supports.