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The underside of a bridge is an arch that can be approx. by the relation y= - 0.1x square + 10, where y is the height, in m, above the ground and x is the width, in m, from the center of the bridge.
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by chillyt001 at October 29, 2009

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is that supposed to be a question or statement? if question, you should put what you are asking for;

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DanielJung August 02, 2010