document.write( "Question 138617: Can someone help me with this problem?
\n" ); document.write( "by using this model P=11+44Inx, how many years will it take for the percent of spam to reach 85%?\r
\n" ); document.write( "\n" ); document.write( "The problem I worked before this was P=11+44Inx, I had to find the % of spam emails that would be in 4 years. The answer was 72%. \n" ); document.write( "
Algebra.Com's Answer #101172 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
by using this model P=11+44Inx, how many years will it take for the percent of spam to reach 85%?
\n" ); document.write( ":
\n" ); document.write( "Substitute 85 for P, find x
\n" ); document.write( ":
\n" ); document.write( "11 + 44*ln(x) = 85
\n" ); document.write( ":
\n" ); document.write( "Subtract 11 from both sides:
\n" ); document.write( "44*ln(x) = 85 - 11
\n" ); document.write( "44*ln(x) = 74
\n" ); document.write( ":
\n" ); document.write( "Divide both sides by 44:
\n" ); document.write( "ln(x) = \"74%2F44\"
\n" ); document.write( "ln(x) = 1.68182
\n" ); document.write( ":
\n" ); document.write( "Find the e^x enter: 1.68182
\n" ); document.write( "x = 5.3753 years
\n" ); document.write( ";
\n" ); document.write( ":
\n" ); document.write( "Check solution in a calc; enter: 11 + 44*ln(5.3753) = 84.999 ~ 85
\n" ); document.write( ":
\n" ); document.write( " \n" ); document.write( "
\n" );