What is the length of the 50th parallel in miles

The physical processes that create most of earth's physical features, including mountains, are known as

Yo! a girl out ! i will give brainliest! hu one of the main reasons societies settled along rivers in the neolithic era was because a) the village elders demanded it. b) the land there was more valuable. c) it was more safe and secure there. d) it provided irrigation for farming.

How many time zone are there on earth