Eratosthenes was the first person to accurately estimate the size of Earth. He accomplished this feat by . Group of answer choices comparing the length of an Earth day with the distance between the Earth and the Sun observing shadows simultaneously cast at two different cities that were separated by a known distance measuring the severity of the greatest earthquakes sailing around the world and estimating his average rate of travel

Which of the following is an accurate description of the recent political history of the democratic republic of the congo? a. religious tensions have escalated into full-scale civil war a number of times since the belgians left the country in 1960. b. the political leader who gained power after the overthrow of a corrupt dictator was assassinated. c. the military leadership felt the country was stable enough, so they permitted democratic elections to take place. d. in 1990, a dictator seized and has held power ever since.