what are hunter-gatherers? How do they use the environment to survive? provide an example of early hunter-gatherers in north America write your answer using four or more complete sentences

What are seismic dampers and why are they important?

What causes the cyclical changes in the appearance of the moon?

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