Suppose at the market price of $5, the total quantity demanded decreased from 27 to 23, is this a "change in the quantity demanded" or "change in demand"?

answer; i believe the correct answer is (180)

the first successful, urban blues recording, selling more than 75,000 copies, was made in year 1920.

mamie smith recorded the first commercially successful example of the urban blues,   with the recording of “crazy blues”."crazy blues" was recorded on august 10, 1920, in new york city. within a month of the release of “crazy blues” it had sold 75,000 copies.

answeri believe this is (true );