What did magellan seek to prove when he set out from spain in 1519

Search america's open door policy with china beginning in 1899. explain how relations with the united states and china have changed and the effects of the open door policy on both countries.

According to the points given on the the frontier (line), when 25 million skateboards are produced, how many rollerblades can be produced?

Explain how agricultural and textile factories impacted the economic development of south carolina.