6. during the permian mass extinction: a) oxygen levels in the deep oceans dropped b) global warming occurred as a result of volcanic eruptions c) a meteorite hit the earth d) both a & b are correct. e) a, b & c are all correct.

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

In the diagram below, ab and bc are tangent to o. what is the measure of

Paraguay is one of the only two countries in the americas that don't have a coastal border. the country is slightly smaller than california. it was under a military dictatorship for 35 years, ending in 1989; today it is a constitutional republic. most of the population is roman catholic, and over 60% of the people live in cities. its environment is threatened by deforestation and water pollution. which of the following facts from the paragraph above best describes an element of paraguay's culture? (apex)