What is the ratio that changes music from one octave to the next

Abelief about the attributes of members of a group of people is called?

In a paragraph of no less than 125 words, explain the single most important factor involved in advancing american classical music in the twentieth century.

Which subgenre of jazz did miles davis’ in a silent way to develop? a.cool jazz b.punk jazz c.jazz rock d.swing e.bebop