Which are secondary sources? select three options. documentary about the great depression textbook chapter about economic markets book of historical fiction written about dust bowl refugees letter home written by someone during the great depression signed federal law aiding people affected by the great depression

answer: they’re different

explanation: different people

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".

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answer: francis bacon is well known for being the secont man to sail around the world. sir francis drake was the first englishman to sail around the world.

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consider an orange peel: if you want to try and lay it flat, you have to stretch it, we know exactly how things are being stretched or squashed at any given point. we have many different map projections because each has different patterns of some projections can even preserve certain features of the earth without