What is a monochromatic color scheme? * O The use of 1 color in a variety of tints and shades
The use of cool colors in artwork
O The use of warm colors in artwork
O The use of complementary colors in artwork

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.