Radio ratings service Nielsen Audio says what percentage of persons ages 12 and older in the United States tune into radio each week?

The first movement of a Classical concerto typically features two of these?

a) developments b) expositions c) recapitulations d) codas

Songs that repeat a group of melodic phrases over and over but with different words are

called what?

a. stanzaic b. strophic c. through composed d. variations