What is the difference between poster and art print?

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

What is one popular pop artist or group (from today or from the past)? why does this person/group's music fit into the pop genre? why do you think the person/group was successful with their music?

Which music device can composers use to lengthen a note by double? a.staccato b.tenuto c.marcato d.fermata e.rubato