document.write( "Question 597170: I'm doing homework and I wasn't able to get to class because I was out of town. I have the worksheet, it tells me to Use the CHANGE OF BASE formula to evaluate the following.\r
\n" ); document.write( "\n" ); document.write( "Log2 (10)=x \r
\n" ); document.write( "\n" ); document.write( "Log12 (1243)=x\r
\n" ); document.write( "\n" ); document.write( "Most of the problems are like this. I looked at examples online, but none of the examples are set up like this.\r
\n" ); document.write( "\n" ); document.write( "What I have been doing is just setting the problem up differently for example Log2 (10)=x would be 10=2^x and I'm really really confused. I need help. Please someone respond.\r
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Algebra.Com's Answer #378043 by AnlytcPhil(1806) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "The change of base formula is:\r\n" );
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document.write( " = \r\n" );
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document.write( "or\r\n" );
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document.write( " = \r\n" );
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document.write( "Therefore\r\n" );
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document.write( "= x =  = = .3010299957   \r\n" );
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document.write( "or you can use:\r\n" );
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document.write( " = x =  = = .3010299957 = .3010299957  \r\n" );
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document.write( "------------------------\r\n" );
document.write( "Log12 (1243)=x\r\n" );
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document.write( " = x =  = = 2.867424856   \r\n" );
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document.write( "or you can use:\r\n" );
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document.write( " = x =  = = 2.867424856\r\n" );
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document.write( "Notice that you may use either \"log\" (which is base 10) or \"ln\" (which is\r\n" );
document.write( "base \"e\").  Both are on your calculator.  The numbers you divide will be\r\n" );
document.write( "different but when you divide them you will always get the same answer either way.\r\n" );
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document.write( "Edwin

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