So I've been busting my brain for a few days now trying to figure this out.

The problem goes like this

Write the standard from of a parabola given the following: Center (0,0) Radius=7

I know the standard form of a parabola is (x-h)^2=4p(y-k). The problem is I'm confused with the information they are giving me. I know P equals the distance from the vertex to focus (directrix), but the question is given me the radius. I've plugged in the h and k given to me, but I need P not R!!!! I've tried to figure this out for a few days now with no success. Please help because I'm starting to lose brain cells.

FrankieCutz