document.write( "Question 286435: During the summer heat a 2-mi bridge expands 2ft in length. If we assume that the bulge occurs in the middle, How high is the bulge?
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Algebra.Com's Answer #207816 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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During the summer heat a 2-mi bridge expands 2ft in length. If we assume that the bulge occurs in the middle, How high is the bulge?
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\n" ); document.write( "this forms two right triangles where:
\n" ); document.write( "a = height of the bulge
\n" ); document.write( "b = 1 mi; half the length of the unexpanded bridge
\n" ); document.write( "c = 1 mi + 1 ft; half the length of the expanded bridge (hypotenuse}
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\n" ); document.write( "Convert everything to feet
\n" ); document.write( "b = 5280 ft
\n" ); document.write( "c = 5281 ft
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\n" ); document.write( "a^2 + b^2 = c^2
\n" ); document.write( "a^2 + 5280^2 = 5281^2
\n" ); document.write( "a^2 = 5281^2 - 5280^2
\n" ); document.write( "a = $\"sqrt%285281%5E2+-+5280%5E2%29\"$
\n" ); document.write( "Solve with calc
\n" ); document.write( "a = 102.7 ft, seems like an awful lot, but there it is.
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