Mayan achievements and inventions include all of the following, except a base 20 mathematic system C. 365-day calendar b. a written language d. the wheel

Prior to the presence of europeans on the continent, the slave trade in africa a) did not exist in any form. b) was limited to internal trade only. c) included the trans-saharan and indian ocean slave trade. d) was rarely needed due to the lack of an agricultural economy.

Why did louis xvi call a meeting of the estates-general in 1789? how long had it been since such a meeting had been called?

The development of england as a nation-state occurred because of increasing?