5) How many significant figures are in the number 0.122210000?

1 Answer
MeneerNask
Jul 8, 2016

If it's written just like that, it's #9#

Explanation:

Significant figures are just what they say. #5# has only one, but #5.000# has four.
This is because #5# can be a rounded number from anywhere between #4.5.... and 5.4999...#
While #5.000# is rounded from between #4.995... and 5.00499...#

The zeroes at the front don't count, so #0.0005# still has only one significant digit.

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