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Bearbeitet von Herakles: 9/9/2015 3:44:31 AM
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I NEED HELP WITH A MATH QUESTION

Pls. Just Part C. [b]Edit: This is the whole question:[/b] [i]"The main section of the suspension bridge in Parc de La Gorge de Coaticook, Quebec, has cables in the shape of a parabola. Suppose that the points on the tops of the towers where the cables are attached are 168 m apart and 24 m vertically above the minimum height of the cables. Use each quadratic function to determine the vertical height of the cables above the minimum at a point that is 35 m horizontally from one of the towers."[/i] [b]Edit 2:[/b] The answer is [b]8.17 m[/b], but I need to show the process.

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  • Ok, I fiddled with the numbers a bit and got 8.17. From the right tower, a horizontal distance to the left tower would be -35, so... (1/294)[(-35)+84]^2 = 8.167 From the left tower, a horizontal distance to the right tower would be 35: (1/294)[35-84]^2 = 8.167 It checks out, 8.167 meters is your vertical distance from the bottom of the cable wire at 35 meters out from each tower. You may be wondering why I didn't add in that -24 at the end. It's because the -24...I have know clue, honestly. It represents vertical distance from top of towers to bottom of cable but it doesn't make sense when you take it into account for the answer so... If I understood how you got those two equations for the towers I may be able to help with that -24 thing, but you got the right answer and the work so I guess it works.

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