A bucket is filled fasterat the lower stairs than at the upper stairs
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This chart shows the number of soldiers killed according to two different sources. source a is a book written by university professors. source b is from a well-known historical website. in a paragraph, explain why the data presented is different, and evaluate the reliability of each source. which should be used in a school research project, and why?

What was different about warfare in the early 1800s and early 1900s?

On average, being married has a(n) effect on happiness.