A monkey starts chucking polished stainless bocce balls at you. The bocce balls are 6cm in radius. Where does your image form as a function of bocce balls distance and what is the size of your image at this distance?
This is obviously a homework question and I'm not looking for a direct answer, just some help through it or at least where to start.
Data: since convex, $r$=-6cm & thus, $f$=-3cm $$\frac{1}f = \frac{1}d_o + \frac{1}d_i$$