I'm afraid there is no way to hide App Store apps on a stock iPad. You have to be jail broke to hide apps. The best you can do on a stock iPad is bury the apps in a folder and then put the folder on the last page of your iPad.
There is a way but only if you have lots of apps, once all your screens are full any extra app will be invisible and you need to use the search feature to find it when you want to use it. A bit drastic I know, but it's the only way!
The IPad Forum is a community of members from all walks of life and from all over the world coming together to share our experiences and to help each other learn about this wonderful piece of technology the Ipad. There is a wealth of information already here in the many threads we have so doing some searches will answer most of the questions you have. If then you cannot find the answer you are seeking then by all means post your question. There are many friendly and informed members here only too willing to help you.