The important contribution to navigation made by Eratosthenes in the third-century bc was a reasonably accurate calculation of the circumference of our planet.
Who is Eratosthenes?
Eratosthenes was born in 276 BC and died in 194 BC. He was a well-known poet, mathematician, a researcher in geography, and theorist of music. He was the first to gauge the size of the planet.
The Earth was first measured by Eratosthenes of Cyrene. The precise measurement of Earth's circumference was greatly aided by Eratosthenes' work in the third-century bc.
As a result, the Eratosthenes in the third century bc accurate calculation of the Earth.
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Opportunity cost refers to what you have to give up to buy what you want in terms of other goods or services. When economists use the word “cost,” we usually mean opportunity cost.
George Goethals was the military engineer who completed construction of the Panama Canal. The correct option among all the options given in the question is option "d". He was appointed the chief engineer of the Panama project by President Roosevelt on 26th of February in the year 1907. Goethals was absolutely determined in seeing through the job that was handed over to him by the President.
The gentry was the highest class, they could vote. then there was also the middle class and finally the poor.
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Answer:
A.skills applied when analyzing the past
