What was the significance of medina charter

What was the u.s. government's office of indian affairs responsible for doing?

According to thomas hobbes concept of the social contract, what do people exchange for the protection by the government?

The chart shows data on the construction of dreadnoughts, or armed battleships, by 1914. (look at chart provided) a logical conclusion that can be drawn from this chart is that britain and germany were a.)engaged in an arms race. b.)looking for ways to cooperate. c.)hoping not to fight on land. d.)the strongest nations on the earth.