How can I connect my iPad to my hp officejet 100 mobile printer?

If that printer were an AirPrint printer (which it is not), the connection would be easy as documented here:

http://support.apple.com/kb/HT4356

Since it is not an AirPrint printer, look for a printer utility in the App Store that would work with it.

iOS AirPrint Printers http://support.apple.com/kb/HT4356

How to Print from Your iPad: Summary of Printer and Printing Options

http://ipadacademy.com/2012/03/how-to-print-from-your-ipad-summary-of-printer-an d-printing-options

How to Print from Your iPad

http://www.dummies.com/how-to/content/how-to-print-from-your-ipad.html

How do you print directly from the iPad

http://www.everymac.com/systems/apple/ipad/ipad-faq/how-to-print-documents-direc tly-from-ipad.html

Print from iPad / iPhone without AirPrint

http://ipadhelp.com/ipad-help/print-from-ipad-iphone-without-airprint/

How to Enable AirPrint on a Mac and Use Any Printer

http://ipadhelp.com/ipad-help/how-to-use-airprint-with-any-printer/

iPad Power: How to Print

http://www.macworld.com/article/1160312/ipad_printing.html

Check out these print apps for the iPad.

Print Utility for iPad ($3.99) http://itunes.apple.com/us/app/print-utility-for-ipad/id422858586?mt=8

Print Agent Pro for iPad ($5.99) http://itunes.apple.com/us/app/print-agent-pro-for-ipad/id421782942?mt=8 Print Agent Pro can print to many non-AirPrint and non-wireless printers on your network, even if they are only connected to a Mac or PC via USB.

FingerPrint turns any printer into an AirPrint printer

http://reviews.cnet.com/8301-19512_7-57368414-233/fingerprint-turns-any-printer- into-an-airprint-printer/

Print (Print to ALL Printers) ($1.99)

https://itunes.apple.com/us/app/print-print-to-all-printers/id299423224?mt=8

 Cheers, Tom 😉