document.write( "Question 598342: A galaxy far, far away is 100 light years across. If a light year is equal to 5,890,000,000,000 miles, how many miles across is this galaxy in scientific notation? \n" ); document.write( "
Algebra.Com's Answer #378546 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "When the number is greater than 1\r\n" );
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document.write( "1. Count the digits from the left up to the decimal (whether it's a visible\r\n" );
document.write( "   or an invisible decimal).  Subtract 1.  That will be the exponent of 10.\r\n" );
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document.write( "2. Write down the first digit, followed by a decimal and then all the rest of\r\n" );
document.write( "   the digits. (You can erase any trailing zeros unless told otherwise)\r\n" );
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document.write( "3.  After that write \" ×10 \" and then place the exponent from step 1 above\r\n" );
document.write( "    the 10.\r\n" );
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document.write( "Let's go through it step by step:\r\n" );
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document.write( "5,890,000,000,000 is greater than 1\r\n" );
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document.write( "1. Count the digits from the left up to the decimal (whether it's a visible\r\n" );
document.write( "   or an invisible decimal).  Subtract 1.  That will be the exponent of 10.\r\n" );
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document.write( "5,890,000,000,000 has an invisible decimal at the right end,  There are\r\n" );
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document.write( "13 digits.  Subtract 1.  That gives 12, So 12 will be the exponent of 10.\r\n" );
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document.write( "2. Write down the first digit, followed by a decimal and then all the rest of\r\n" );
document.write( "   the digits.  (You can erase any trailing zeros unless told otherwise)\r\n" );
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document.write( "5.890000000000  Then we erase the trailing zeros.\r\n" );
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document.write( "5.89\r\n" );
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document.write( "3.  After that write \" ×10 \" and then place the exponent from step 1 above\r\n" );
document.write( "    the 10.\r\n" );
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document.write( "5.89×1013\r\n" );
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document.write( "Edwin
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