document.write( "Question 23360: What is the best solution for 2.3^x = 48 \n" ); document.write( "
Algebra.Com's Answer #12132 by rapaljer(4671)\"\" \"About 
You can put this solution on YOUR website!
Do you know about logarithms? That is the best way! Take the ln of both sides:\r
\n" ); document.write( "\n" ); document.write( "\"2.3%5Ex+=+48\"
\n" ); document.write( "\"ln%282.3%5Ex%29+=+ln%2848%29\"\r
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\n" ); document.write( "\n" ); document.write( "Use the property of logarithms that says \"log+M%5EN+=+N+log+M+\"
\n" ); document.write( "\"ln%282.3%5Ex%29+=+ln%2848%29\"
\n" ); document.write( "\"x%2A+ln%282.3%29+=+ln%2848%29\"\r
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\n" ); document.write( "\n" ); document.write( "Now divide both sides of the equation by ln(2.3):\r
\n" ); document.write( "\n" ); document.write( "\"x%2A+ln%282.3%29+=+ln%2848%29\"
\n" ); document.write( "\"%28x%2A+ln%282.3%29%29%2F%28ln2.3%29+=+ln%2848%29%2F%28ln2.3%29\"\r
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\n" ); document.write( "\n" ); document.write( "With a calculator, this is \r
\n" ); document.write( "\n" ); document.write( "x= 4.647807191 (approximately) which rounds off to 4.65.\r
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\n" ); document.write( "\n" ); document.write( "If you would like to check this (and I would before I embarrass myself to the world by posting another wrong answer!!), you can use a calculator to calculate \"2.3%5E%284.6478%29\". Using the calculator value of x, it comes out to 48, so it checks!!\r
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\n" ); document.write( "\n" ); document.write( "R^2 at SCC\r
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