I like this site http://davidmlane.com/hyperstat/z_table.html
I got the address for this site from the Stick Topic labeled " Reference Material "
In a certain hyperbola, the center is at (2, 0), one focus is at (2, 6) and one vertex is at (2, -3). The equation of this hyperbola can be written as
(y−k)2a2−(x−h)2b2=1
Find h+k+a+b
Try looking at this:
https://www.youtube.com/watch?v=WU8k96qsA4E
Once you work it out you can check it by graphing in desmos.