Which statement correctly describes one of Aryabhata’s contributions to the sciences? He discovered how eclipses work.
He created vaccines to prevent diseases.
He created new surgical procedures.
He discovered new chemical reactions.

In the mid-1800s, how did american indians often react to the us government signing treaties with tribal chiefs to establish reservations? many american indians did not accept the treaties and resisted relocating. many american indians fought for land taken away by the dawes act. many american indians bought land in oklahoma from white settlers. many american indians accepted the treaties and relocated voluntarily.

Soon-yi's house has a hexagonal window made up of six identical equilateral triangles as pictured below.

On the map above, areas along the coast are colored green (letter b). what type of climate do these areas have? a. arid b. semiarid c. mediterranean d. humid subtropical