4
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I am still having trouble grasping significant figures.

How many significant figures would be in this quantity?

$01010.0$

I feel like it is 3, but not quite sure.

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  • $\begingroup$ @hardmath there you go $\endgroup$ – user266519 Sep 3 '15 at 1:34
  • $\begingroup$ Should be 5. The only reason you would include the 0 to the right of the decimal would be because it was significant. $\endgroup$ – turkeyhundt Sep 3 '15 at 1:58
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It looks as though it is correct as written, with 5 digits. There is only .0 behind 1010.

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It should be 5. If I recall correctly, when you explicitly add zeroes on the end of a decimal then they count as significant figures.

EDIT: source

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It's $5$ significant digits, the zero in front does not mean anything. The $1010$ is all significant because the zero i sandwiched between and there is a decimal point, and the $.0$ is also significant because it tells you we measured to this decimal point.

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