document.write( "Question 507604: Two planes leave the airport at the same time. The first plane flies 20 miles west. While the other plane flies 21 miles south. How far apart are the two planes after they land? \n" ); document.write( "

Algebra.Com's Answer #340606 by josmiceli(19441) $\"\"$ $\"About$

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The distance between them is the hypotenuse
\n" ); document.write( "of a right triangle
\n" ); document.write( " $\"+d%5E2+=+20%5E2+%2B+21%5E2+\"$
\n" ); document.write( " $\"+d%5E2+=+400+%2B+441+%7D%7D%0D%0A%7B%7B%7B+d%5E2+=+841+\"$
\n" ); document.write( " $\"+d+=+sqrt%28841%29+\"$
\n" ); document.write( " $\"+d+=+29+\"$ mi
\n" ); document.write( "They are 29 mi apart \n" ); document.write( "

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