Today, airport landing changes are based mostly on aircraft weight or number of passengers on the flight. What more economically efficient ways can you think of, meaning what other ways would incentive the most efficient behavior for the airports?

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; /// the above statement is (false);

answerpounds of plastic to purchase 200+60-20=(240);

paying attention to the details