document.write( "Question 84307: The diameter of the Milky Way disc is approximately 9 * 10^20 meters. How long does it take light, traveling at 10^16 m/year to travel across the diameter of the Milky Way? \n" ); document.write( "
Algebra.Com's Answer #60706 by checkley75(3666)\"\" \"About 
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9*10^20/10^16=9*10^4 light years. \n" ); document.write( "
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