Example of instrument

Piano

Explanation:

Its can make music, can be a profession and etc.

answer; /// the answer to the above question is (true);

including the octave, the answer would 8 notes in a major scale with one note being played twice. ex) c major scale includes: c, d, e, f, g, a, b, c

notice that c is played twice

however, if you were to ask me how many different notes are in a major scale- the answer would be 7.