The rules for identifying significant figures when writing or interpreting numbers are as follows:
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).
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.
Leading zeros are not significant. For example, 0.00052 has two significant figures: 5 and 2.
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.
Say 251.206 to 4 significant figures = 251.2 Say 251.274 to 4 significant figures = 251.3 Say 25461.214 to 2 significant figures = 25000
4 significant figures.
To find a number to two significant figures or any amount of significant figures you look at one plus the amount of asked figures, in this case the third significant figure, and if it is 5 or greater increase the asked amount of significant figures by one. If it is 4 or less make no changes to your number. Finally report the calculated number with the asked amount of significant figures.
There are 3 significant figures in 94.2.
There are 4 significant figures in 0.0032. Seems to be only 2 significant figures in this number.
There are four significant figures in 0.1111.
20.2 has three significant figures.
There are two significant figures in 0.025.
5 significant figures.
Trailing zeros ALWAYS count as significant figures, so 700.0 would have 4 significant figures.
That depends on how many significant figures you are talking about.If three significant figures then 700 is the largest that rounds to 700.If four significant figures are to be rounded to three significant figures then 700.4If five significant figures are to be rounded to three significant figures then 700.49If six significant figures are to be rounded to three significant figures then 700.499etc.
The significant figures in 0.000042500 are: 0.0000425. So, there are 8 significant figures.