This musician was the first to use staff lines to notate music: O A. Pope Gregory I.
O B. Guido d'Arezzo.
C. Hildegard von Binges.
D. Léonin.
Please answer this question fast it’s for a quiz!

Suppose that you are in a room with 3 doors and a crack in the ceiling for light. that is all. the doors each have a sign on them that says what there is behind them. door #1. a pool of corrosive acid. door #2. a crocodile that hasn't eaten in 8 months. door #3. a solar "oven". a giant lens that focuses all the sunlight at the entrance of the door. you must choose a door, which door do you choose?

When an art establishment gives its stamp of approval to a art, it called the

Monitoring your grades will you pinpoint your academic weaknesses. select the best answer from the choices provided t f