The answer is 3.
Significant figures in a whole numbers are integers on the left of the decimal point beginning with the first non-zero number.
That's confusing so let me use some examples:
589. has 3 because there are no zeros to the left of the decimal and 3 numbers
5089. has 4 because there are no ending zeros and 4 numbers.
5890. has 3 because only the the zero is next to the decimal.
58900. also has 3.
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the precision of the answer must have the same number of significant digits as the measurement with the least significant digits- the site explains the rules and how to identify significant digits
Significant digits are digits that provide useful information, for instance 123 has 3 significant digits and 30010 has 4 significant digits. So basically zeros aren't significant unless they are between two other numbers. 0.1020 has only 4 significant digits. A+: 4
Four - zeros between significant digits are significant.
It has 4 significant figures.0.007080 has four significant digits.
No, counting numbers you can ignore or say they have an infinate number of significant digits. By counting numbers I mean things you count, or non measurements, or numbers you wouldn't round to significant digits anyway . Measurements always have significant digits.