How many times can a specific pitch appear in a tone row?

a. one
b. two
c. three
d. twelve

Escoge uno de estos temas, escribe tu tesis y plantea 3 argumentos y 3 contraargumentos. a. control de natalidad de gatos y perros

Most of the written music that has been preserved from the middle ages is a. sacred. b. for flute and guitar. c. polyphonic. d. dance music.

So my science teacher said anything that makes noise can in a way make music, instruments make music, and mayonnaise makes sound. so i have a question, do not report. is mayonnaise a instrument?