How to create a map with points and radius?

I am doing a presentation for a business plan in school and want to create a map via Mapquest, Google Maps, or another site, which I can put points at my location as well as at all my competition's locations and then put a radius around my location. Does anyone know a site which I can do all this and then put into my powerpoint?

Could you not just screenshot the portion of google maps you need and photoshop the rest of the stuff on top?kamikaze_pigmy