What is A squared + B squared = C squared, if A=21 and B=61

Describe alvord's tone in the two paragraphs on the history of dartmouth and its native american studies program (paras. 21-22)?

The sun a. will become a red giant within two to three million years b. is in its main sequence, which willlast thousands of years c. is in its main sequence, which will last billions of years. d. will explode as a supernova after its main sequence

Compare and contrast the two settlements (dhaka, bangladesh and the favela outside of rio de janeiro, brazil). consider political, social, economic, and environmental issues.