document.write( "Question 876422: suppose a spacecraft recently started on a journey inside the solar system. the trip is 4.5 * 10^9 miles long and will take 7 1/2 years. How many miles will the spacecraft travel per year? \n" ); document.write( "
Algebra.Com's Answer #528764 by jim_thompson5910(35256)\"\" \"About 
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4.5 * 10^9 miles = 4.5 billion miles\r
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\n" ); document.write( "\n" ); document.write( "(4.5 billion miles)/(7.5 years) = 0.6 billion miles per year\r
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\n" ); document.write( "\n" ); document.write( "0.6 billion miles per year = 600 million miles per year
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