If your average is an 83 and you took a test and made a 80 on it what is your average then?

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.

answer; buying the bill at a discount from the face value to be received at maturity;

answermarginal cost;