A few questions:

[LodSb]

1) How would I solve a system of equations to find the intersecting points of a circle and a line? If I use the solve app, it only gives me the points for one intersection, of the two that there are. Any idea how I would do this?

2) Is there a way I can covert back and fourth between decimal and scientific notation? I have seen multiple apps, but I'm not sure which one is the best, or most up to date.

3) Is there a way to analyze graphs to get stuff like the focal point or directrix of a parabola?

4) Is there a way to get the Fcn option that is available in the Function app to also show up in the Advanced Graphing app?

5) Is there a guide online or here somewhere for what all of the options do? I'm a pretty new user to this calculator and would like to learn more about it.