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
\n" ); document.write( "\n" ); document.write( "Thanks
\n" ); document.write( "

Algebra.Com's Answer #378039 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
Log2 (10)=x
\n" ); document.write( "Log12 (1243)=x
\n" ); document.write( "----
\n" ); document.write( "Change of base Formula: log(Base A)B = [log(base C)B] / [log(base C)A]
\n" ); document.write( "Note: The \"C\" can be any positive number.
\n" ); document.write( "---
\n" ); document.write( "Your Problems:
\n" ); document.write( "x = log(10)/log(2) = 1/0.3010 = 2.3219
\n" ); document.write( "---------------
\n" ); document.write( "x = log(1243)/log(2) = 10.2796
\n" ); document.write( "==================================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "
\n" );