<PRE><B>Question 35270</B>
I think I solved this one earlier this evening.  Can you use a graphing calculator?  Graph y1 = lnx - 4ln3, and y2 = ln(5/x) on the same grid, and find the point where the graphs intersect.


{{{graph( 300, 300, -10,25, -20, 10, ln(x) - 4ln(3), ln(5/x) )}}}


With the graphing calculator I get approximately x =20.124612, which rounds off to x=20.1246.  I think I solved the other problem using logarithms.


R^2 at SCC </PRE>