document.write( "Question 273574: Two jets leave Chicago at the same time, one flying due west @ 750 km/hr, the other flying due east @ 850 km/hr. After how long will the planes be 4000 km apart? \n" ); document.write( "
Algebra.Com's Answer #199825 by josmiceli(19441)\"\" \"About 
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\"t+=+4000%2F%28750+%2B+850%29\" hrs
\n" ); document.write( "\"t+=+4000%2F1600\" hrs
\n" ); document.write( "\"t+=+2.5\"hrs
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