document.write( "Question 630118: The speed of sound is approximately 760 mph in air. If a gun is fired mile away, how long will it take the sound to reach you? \n" ); document.write( "
Algebra.Com's Answer #396745 by Alan3354(69443)\"\" \"About 
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The speed of sound is approximately 760 mph in air. If a gun is fired mile away, how long will it take the sound to reach you?
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\n" ); document.write( "d = r*t
\n" ); document.write( "t = d/r
\n" ); document.write( "t = 1/760 hr
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