What happened to all of earth's continents as the paleozoic era came to a close?

a. they split in half
b. they fused into pangaea
c. they formed gondwana
d. they moved toward the poles (north and south)

in : )

Rectangle qrst is shown. angle qrt is congruent to angle str, and angle str is complementary to angle qtr. which statement is true about angles qrt and qtr? they are congruent. they are complementary. they are supplementary. they are right angle

The next best alternative given up when making a choice is called the a. opportunity cost b. comparative advantage c. primary objective d. negative consequence select the best answer from the choices provided. a b c d

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