If you've just done a restart, there will be no apps in RAM.
The list in the multitask bar is just that, a list of apps you've opened, with the most recently used fist. They do not go away unless you manually remove them. The apps listed may or may not be in RAM, though the most recent ones usually are in RAM in an inactive (frozen) state, as Followthesapper said.
If it has been a while since you restarted the iPad (and I mean a power down, not just put it to sleep) it is sometimes useful to manually close the more recent apps. Most of the time you do this when an app has been misbehaving. Occasionally it will be necessary to manually clear apps if you can not get a large app to work properly. That's mostly with the iPad 1.
If you are not having problems you can safely ignore the list of apps, other than using it to switch between recently opened ones.
Fraser Speirs - Blog - Misconceptions About iOS Multitasking
Fraser Speirs - Blog - iOS Multitasking in Detail