Question

You calculate that 213,000 m/s is the answer to a problem. What can you conclude about your answer?
a.
It has six significant figures.
b.
It has three significant figures.
c.
It’s not possible to know how many significant figures are in an answer without knowing its accepted value.
d.
It is not possible to know how many significant figures are in an answer without knowing its percent error.

Answer 1

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.

Answer 2

I would have to agree