Eep- in math :3 please help meh

I think its 14, but im not sure

Explanation:

plz tell me if im right, hope i helpd

c, d, e, f, g, a, b, and c.

sometimes western music will also use solfege. the names of these are do ra me fa sol la si (or ti) and do.

to indicate a note a half step higher or lower then the original note, you would say c # (for a half a step above c) or bb (for half a step below b)