What mathematical concept did the Maya develop before other civilizations? the 365-day calendar
knot-work records
codices
the idea of zero

How did the roaring 20s mark the end of the progressive era? a. mass production reduced wealth disparity and turned public opinion pro business b. labor unions won big legislative gains in workers rights and disbanded c. public officials cut taxes on businesses and reduced spending on services d. america increasing influence in world affairs redirected public attention to foreign policy

Which statement best describes a major advantage of a confederal system of government over a unitary system

How do we make changes to the us constitution? a. through presidential order. b. through direct primary elections. c. through the amendment process. d. we can't!