document.write( "Question 246908: If the base of a ladder is placed on the ground 4ft from a house, how tall must the ladder be (to the nearest foot) to reach the chimney top that extends 18.5ft above the ground? \n" ); document.write( "
Algebra.Com's Answer #180218 by richwmiller(17219)\"\" \"About 
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we are setting up a right triangle.
\n" ); document.write( "a^2+b^2=c^2
\n" ); document.write( "where b=4 ft
\n" ); document.write( "and a=18.5 ft.
\n" ); document.write( "4^2+18.5^2=c^2
\n" ); document.write( "where c is the length of the ladder
\n" ); document.write( "and of course we only want positive numbers.\r
\n" ); document.write( "\n" ); document.write( "Remember we want to the nearest foot.\r
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