document.write( "Question 1111150: A compute manufacturer finds that when x millions of dollars are spent on research, the profit, P(x), in millions of dollars is given by P(x)=20+5log base 3 (x+3). How much should be spent on research to make a profit of 40 million dollars? \n" ); document.write( "
Algebra.Com's Answer #726200 by ankor@dixie-net.com(22740)\"\" \"About 
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A compute manufacturer finds that when x millions of dollars are spent on research, the profit, P(x), in millions of dollars is given by P(x)=20+5log base 3 (x+3). How much should be spent on research to make a profit of 40 million dollars?
\n" ); document.write( ":
\n" ); document.write( "\"20%2B5%2Alog%283%2C%28x%2B3%29%29\" = 40
\n" ); document.write( "\"5%2Alog%283%2C%28x%2B3%29%29\" = 40 - 20
\n" ); document.write( "\"5%2Alog%283%2C%28x%2B3%29%29\" = 20
\n" ); document.write( "\"log%283%2C%28x%2B3%29%29\" = \"20%2F5\"
\n" ); document.write( "\"log%283%2C%28x%2B3%29%29\" = 4
\n" ); document.write( "the exponent equiv of logs
\n" ); document.write( "x + 3 = \"3%5E4\"
\n" ); document.write( "x + 3 = 81
\n" ); document.write( "x = 81 - 3
\n" ); document.write( "x = 78 spent on research
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