document.write( "Question 1108421: Sound travels about 750 miles per hour. If you stand in a parking lot near a building and sound a horn, you will hear an echo. \r
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Algebra.Com's Answer #723434 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
Half a second?\r
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\n" ); document.write( "\n" ); document.write( "\"%281%2F2%29seconds%2A%281%2F3600%29%28hour%2Fseconds%29750%28miles%2Fhour%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"750%2F%287200%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"75%2F720\"\r
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\n" ); document.write( "\n" ); document.write( "\"1%2F10\" of a mile
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