Between 1950 and 2000, the number of independent states

remained the same
increased slightly
decreased slightly
increased significantly
decreased significantly

:calculate the sum of the interior angles of a 13-sided polygon.

The two types of plains are coastal plains and lowland plains

The declining axolotl population in mexico city is an example of in overcrowded cities. a. the surpassing of support capacity b. changes to natural environments and native species c. the lack of safe homes and tenured spaces d. the effects of a growing urban heat island