Who were the first people to settle in guyana?

How would you find the measure of one interior angle

Acivilization exists for several hundred yeaars, developing its own language. such a civilization probably has been: a. farming corn b. suffering from a lack of contact with the outside world. c. isolated by mountains or some other physical barriers. d. starving from lack of trade.

Suppose that the sun shrank in size but that its mass remained the same. what would happen to the orbit of the earth?