Which three economic and political crisis are latin america facing today

Which four of these developments were made under mongol rule during the pax mongolica? the extension of the grand canal in china the spread of christianity the spread of weapons that used gun powder the invention of new medicines the establishment of a postal system the invention of geometric models of lunar motion

Which amendment best addresses the fears of the federalists like james madison,that rights and powers not specifically listed in the consttuition or bill of rights will not be protected in the future

What notable contributions to science has sandia national labs (snl) produced over the years?