Welcome.
When you write "has a ? over it" you mean the Dock, don't you? The application icons in the Dock have a question mark instead of their icons.
Have you taken a look in the actual Applications folder yet? You can go there via switching to Finder, opening a Window and pressing CMD+SHIFT+A or via the GO Menu item.
Now that you are in the Applications folder, can you verify the existence of the applications or not?
Btw, can you tell us what exact Mac and Mac OS X version you have?
A more descriptive and precise thread title will help cater to the right audience and get you more responses. (see rule #3 under How do I get help with a hardware or software problem)
To edit your thread title, just click on the
button on the bottom right of your original post and then click the "Go Advanced" button below your message.
Have you also taken a look at MRoogle, since that question may have been asked several times?