document.write( "Question 1104847: A window is in the shape of a rectangle surmounted by a semicircle. The height of the rectangle is 0.4m more than the width. The total area of the window is 10.4m2 find the width and height of the window. \n" ); document.write( "
Algebra.Com's Answer #719546 by josmiceli(19441)\"\" \"About 
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Let the width of the rectangle = \"+w+\" m
\n" ); document.write( "The height of the rectangle is \"+w+%2B+.4+\" m
\n" ); document.write( "---------------------------------------
\n" ); document.write( "The area of the semicircle = \"+%281%2F2%29%2Api%2A%28w%2F2%29%5E2+\" m2
\n" ); document.write( "The total area is:
\n" ); document.write( "\"+w%2A%28+w+%2B+.4+%29+%2B+%281%2F2%29%2A%281%2F4%29%2Api%2Aw%5E2+=+10.4+\" m2
\n" ); document.write( "\"+w%5E2+%2B+.4w+%2B+%28+pi%2F8+%29%2Aw%5E2+=+10.4+\" m2
\n" ); document.write( "\"+%28%28+pi+%2B+8+%29+%2F+8+%29%2Aw%5E2+%2B+.4w%5E2+-+10.4+=+0+\"
\n" ); document.write( "\"+1.3927w%5E2+%2B+.4w+-+10.4+=+0+\"
\n" ); document.write( "Rounding off:
\n" ); document.write( "\"+1.4w%5E2+%2B+.4w+-+10.4+=+0+\"
\n" ); document.write( "Use quadratic formula
\n" ); document.write( "\"+w+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"
\n" ); document.write( "\"+a+=+1.4+\"
\n" ); document.write( "\"+b+=+.4+\"
\n" ); document.write( "\"+c+=+-10.4+\"
\n" ); document.write( "\"+w+=+%28-.4+%2B-+sqrt%28+.4%5E2-4%2A1.4%2A%28-10.4%29+%29%29%2F%282%2A1.4%29+\"
\n" ); document.write( "\"+w+=+%28-.4+%2B-+sqrt%28+.16+%2B+58.24+%29%29%2F+2.8+\"
\n" ); document.write( "\"+w+=+%28+-.4+%2B+sqrt%28+58.4+%29%29+%2F+2.8+\"
\n" ); document.write( "\"+w+=+%28+-.4+%2B+7.642+%29+%2F+2.8+\"
\n" ); document.write( "\"+w+=+7.242+%2F+2.8+\"
\n" ); document.write( "\"+w+=+2.586+\"
\n" ); document.write( "and
\n" ); document.write( "\"+w+%2B+.4+=+2.986+\"
\n" ); document.write( "-----------------------
\n" ); document.write( "The height, including semicircle is
\n" ); document.write( "\"+2.986+%2B+w%2F2+\"
\n" ); document.write( "\"+2.986+%2B+2.586%2F2+\"
\n" ); document.write( "\"+2.986+%2B+1.293=+4.279+\"
\n" ); document.write( "----------------------------------
\n" ); document.write( "width = 2.586 m
\n" ); document.write( "height = 4.279 m
\n" ); document.write( "-------------------
\n" ); document.write( "check:
\n" ); document.write( "\"+1.4w%5E2+%2B+.4w++=+10.4+\"
\n" ); document.write( "\"+1.4%2A2.586%5E2+%2B+.4%2A2.586+=+10.4+\"
\n" ); document.write( "\"+1.4%2A6.687+%2B+1.0344+=+10.4+\"
\n" ); document.write( "\"+9.3618+%2B++1.0344+=+10.4+\"
\n" ); document.write( "\"+10.3962+=+10.4+\"
\n" ); document.write( "Looks close enough -error due to rounding off\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "
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