document.write( "Question 751230: How to find the value of a number if its missing from the calculator? Example... log7? \n" ); document.write( "
Algebra.Com's Answer #464721 by tommyt3rd(5050)\"\" \"About 
You can put this solution on YOUR website!
use log conversion formula:\r
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\n" ); document.write( "\n" ); document.write( "\"log%28a%2Cb%29=log%28c%2Ca%29%2Flog%28c%2Cb%29\"\r
\n" ); document.write( "\n" ); document.write( "where c=e or c=10 (because those bases are commonly on the calculator)\r
\n" ); document.write( "\n" ); document.write( "so for example\r
\n" ); document.write( "\n" ); document.write( "\"log%287%2C12%29=log%2812%29%2Flog%287%29\"\r
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\n" ); document.write( "\n" ); document.write( ":)
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