document.write( "Question 752928: A 10-ft ladder leans against a wall so that the base of the ladder is 4 ft from the wall. How high up on the wall will the ladder reach (to the nearest foot)? \n" ); document.write( "
Algebra.Com's Answer #458123 by jim_thompson5910(35256)\"\" \"About 
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\"a%5E2+%2B+b%5E2+=+c%5E2\" Start with the pythagorean theorem\r
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\n" ); document.write( "\n" ); document.write( "\"4%5E2+%2B+x%5E2+=+10%5E2\" Plug in the known values, let x be the unknown value, now solve for x\r
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\n" ); document.write( "\n" ); document.write( "\"16+%2B+x%5E2+=+100\"\r
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\n" ); document.write( "\n" ); document.write( "\"x%5E2+=+100-16\"\r
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\n" ); document.write( "\n" ); document.write( "\"x%5E2+=+84\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+sqrt%2884%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+9.16515\" Use a calculator here\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+9\" Round to the nearest foot (as instructed)\r
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\n" ); document.write( "\n" ); document.write( "Answer: 9 feet
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