Which of the following individuals estimated the circumference of the earth and the distance to the sun and the moon?
a. archimedes
b. eratosthenes
c. aristarchus
d. euclid

It was "b. Eratosthenes" who estimated the circumference of the earth and the distance to the sun and the moon, since he was one of the pioneers of this type of geographical use of geometry. 

The coast of north america , basically yes newfoundland , i would say c , good luck

In the midwest because it has more moderate climate than the north or south west which makes farming far easier.