What innovation improved american aviation over the course of world war 2

Brainliestttme : ) what are trading blocs and what is the impact of international cooperation?

Which of the following wrote detailed accounts about early native american? a) spanish b) french c) americans d) mexicansi need this !

Who introduced arabic numerals to italy, which make bookkeeping possible? a. brunelleschi b. cosimo de medici c. fibonacci d. gregory xi e. giovanni de bicci de medici