Respuesta :
I always look at it this way....
> ---> open circle
≥ ---> the line underneath is kind of a cheat sheet. If there is a "line" (....or equal to...), then you fill in the dot.
> ---> open circle
≥ ---> the line underneath is kind of a cheat sheet. If there is a "line" (....or equal to...), then you fill in the dot.