The composer can experiment with different sounds that cannot be produced by
regular musical instruments such as the piano or
the violin, this statement refers to
a. musique concrete
c. Piano concerto
b. musiquecoustic
d. Piano music

perimeter = 2l +2w, divide total perimeter by 2 for total length of 1 side and 1 width

172/2 = 86 (  total for 1 side and 1 width)

86-24 = 62 (since length is 24 ft longer subtract 24 then divide by 2 for width)

62/2 = 31

width = 31 feet

length = 31 +24 = 55 feet

check: 31*2 = 62, 55*2 = 110,  110+62 = 172

12-bar blues chorus = a a b