Ineed with 5 questions i give brianliest and the question it 25 points

the answer is d . a measurement   how can artists measure the width of the human face to use drawing for correct proportions

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.