Q: I have a iPad 2 and want to print of a invoice can I print from my iPad 2 on my hp photos art 3110 all in one

your printer doesn't appear in the compatible Airprint printers listed in this basic article: http://support.apple.com/kb/ht4356

There might be an app HP has to help you out, but there's no Apple supported way, as it's not an Airprint printer.

Anyways, hope this helps

Good luck

Stijn