The rules for identifying significant figures when writing or interpreting numbers are as follows:
1. All non-zero digits are considered significant. For example, 91 has two significant figures (9 and 1), while 123.45 has five significant figures (1, 2, 3, 4 and 5).
2. Zeros appearing anywhere between two non-zero digits are significant. Example: 101.1203 has seven significant figures: 1, 0, 1, 1, 2, 0 and 3.
3. Leading zeros are not significant. For example, 0.00052 has two significant figures: 5 and 2.
4. Trailing zeros in a number containing a decimal point are significant. For example, 12.2300 has six significant figures: 1, 2, 2, 3, 0 and 0. The number 0.000122300 still has only six significant figures (the zeros before the 1 are not significant). In addition, 120.00 has five significant figures since it has three trailing zeros.
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There are four significant figures in .007001
100,3 has four significant figures.
It has four significant figures
1. All non-zero digits are significant. For example, 295 has three significant figures. 2. Leading zeroes in front of a decimal are not significant. For example 0.295 has three significant figures. 3. Zeroes between other significant figures are significant. For example 2095 has four significant figures. 4. Trailing zeroes after a decimal are significant. For example 295.0 has four significant figures. And 2950 has three significant figures because the trailing zero does not occur after a decimal.
Four significant figures.