Answer:
ok that's all I could gather for now ill send the rest as a comment
<span>Federalist led by Alexander Hamilton</span>
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It was a destination for pilgrimage already before the times of Muhammad. People travelled there for example to see the Zamzam Well, which dates back to the times of Abraham.
213,000 can be rewritten as 2.13*10^5. This tells us that it has has 3 significant digits.
Your correct answer is b. It has three significant figures.