The greek geographer, mathematician, astronomer, and poet who calculated the circumference of earth was a. eratosthenes b. archimedes c. pythagoras d. plato

Due to what conditions were slaves brought into brazil to work the fields? the climate was similar to that of africa. the indigenous workers were hired as managers. the indigenous workers had died from exposure to diseases from europe. slaves from africa were already used in other regions and brazil was the next location.