To figure out how many significant figures there are in a number you must first know the rules. All numbers 1-9 are counted towards the number of significant figures. The only number you need to worry about is 0.
-If there are 0's between digits (like 105), they are counted towards sig figs.
-If, to the right of a decimal point, the number ends in a 0, or multiple 0's (4.660), they all count towards sig figs.
-If, to the left of a decimal point, the number ends in 0 (4500), the 0 (or this case zeros) do not count towards sig figs.
-If there is a lone 0 to the left of a decimal point (0.112), the 0 does not count towards sig figs.
With the number 3.0800, you know that the 3 and the 8 both count towards significant figures. The 0 in between them counts as well. Then the two 0's at the end count towards sig figs. In all the number 3.0800 has 5 significant figures.
Truncated to one significant figure, it's 9,000 .Rounded to one significant figure, it's 10,000.
1000 is written with one significant figure, with only the 1 being a significant figure.
It has 1 significant figure.
The significant figure 2.00 has to do with the certainty of a measurement.
0.004 has 1 significant figure.
30800
49,567.795
Neptune
The significant figure of 37.753 to 1 significant figure is 40.
Truncated to one significant figure, it's 9,000 .Rounded to one significant figure, it's 10,000.
1000 is written with one significant figure, with only the 1 being a significant figure.
It has 1 significant figure.
The first significant figure of 0.000169 is the 1 and it has 3 significant figures.
The significant figure 2.00 has to do with the certainty of a measurement.
The significant figure of 78.00100 is 78.00. It had 7 significant figures and a least significant decimal of -5.
0.004 has 1 significant figure.
1512 to 1 significant figure is 2000