document.write( "Question 536039: if 2^a=3 then 8^a=?
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Algebra.Com's Answer #352108 by Edwin McCravy(20056)\"\" \"About 
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document.write( "\"2%5Ea\" = 3\r\n" );
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document.write( "Cube both sides:\r\n" );
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document.write( "\"%282%5Ea%29%5E3\" = \"3%5E3\"\r\n" );
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document.write( "Use the rule of exponents \"%28X%5EY%29%5EZ\" = \"X%5E%28YZ%29\" and replace 3³ by 27\r\n" );
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document.write( "\"2%5E%283a%29\" = 27\r\n" );
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document.write( "Use that same rule of exponents in reverse: \"X%5E%28YZ%29\" = \"%28X%5EY%29%5EZ\"\r\n" );
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document.write( "\"%282%5E3%29%5Ea\" = 27\r\n" );
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document.write( "Replace 2³ by 8\r\n" );
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document.write( "\"8%5Ea\" = 27\r\n" );
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document.write( "Edwin
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