document.write( "Question 1009161: A certain highway has a 2% grade. How many feet does it rise in a horizontal distance of 1 mile? (1 mile = 5280feet.) \n" ); document.write( "
Algebra.Com's Answer #625454 by farohw(175)\"\" \"About 
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\n" ); document.write( "Convert 2% to 2/100 then set up your equation:\r
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\n" ); document.write( "\n" ); document.write( "\"2%2F100+=+y%2F5280\"\r
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\n" ); document.write( "\n" ); document.write( "Before solving for y, you may choose to reduce accordingly:\r
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\n" ); document.write( "\n" ); document.write( "\"1%2F50+=+y%2F5280\"\r
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\n" ); document.write( "\n" ); document.write( "By cross multiplication, \"50y+=+5280\" \r
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\n" ); document.write( "\n" ); document.write( "Divide both sides by 50 to obtain a value for y, \r
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\n" ); document.write( "\n" ); document.write( "\"50y%2F50+=+5280%2F50\" --> \"y+=+528%2F5\" or 105.6.\r
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\n" ); document.write( "\n" ); document.write( "The highway rises 105.6 ft in a horizontal distance of one mile.\r
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\n" ); document.write( "\n" ); document.write( "Verify: \r
\n" ); document.write( "\n" ); document.write( "\"2%2F100+=+y%2F5280\" where y = 105.6\r
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\n" ); document.write( "\n" ); document.write( "\"2%2F100+=+105.6%2F5280\"\r
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\n" ); document.write( "\n" ); document.write( "\"2%2F100+=+1%2F50\" which is also 2% is true.\r
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