document.write( "Question 1062337: A parabolic bridge is built across the water. It is 50m long, and its highest point is 4.5m high. \r
\n" ); document.write( "\n" ); document.write( "a)What is the equation of the graph, where y= The height above the water, and x=the horizontal distance from the origin.\r
\n" ); document.write( "\n" ); document.write( "b)A floating platform 20m wide is towed under the bridge. What is the greatest height of the deck above water level if the platform is to be towed under the bridge with at least 30cm horizontal clearance on either side.\r
\n" ); document.write( "\n" ); document.write( "Any help would be appreciated :) \n" ); document.write( "

Algebra.Com's Answer #677220 by josgarithmetic(39617) $\"\"$ $\"About$

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Where is your origin? How high is the base of the bridge above the water?\r
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\n" ); document.write( "\n" ); document.write( "With just the given, you might put the bridge base at the water level and assign the origin at the middle between the two sides of the water (stream or creek or river). This way, your zeros are at (-25,0) and (25,0), and vertex as maximum height is (0, 4.5). Your unknown constant factor in $\"y=a%28x-0%29%5E2%2B4.5\"$ can be determined. \n" ); document.write( "

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