|Mine uses around 12 to 13 Meg, increasing in size slightly as I open programs, decreasing in size back to 12 to 13 Meg as I close open programs. When I boot into Windows, it is around 11 Meg.|
Some of your programs may not release RAM after they are terminated. This may be a design feature or design fault of those programs not releasing RAM.
You may also have a problem which is rare but happens sometimes and is called Memory Leak. If you have that problem, you must find which program(s) causing it.
Hope the above helps.