How many significant figures are in the measurement 811.40 grams?
In order to be able to say how many sig figs are used for the measurement
- non-zero digits are always significant
- a trailing zero that follows a decimal point and a non-zero digit is always significant
In your case, the measurement
has four non-zero digits and one significant trailing zero.
#color(blue)(8, 1, 1, 4) ->#non-zero digits
#color(white)(8,1,1,)color(red)(0) ->#significant trailing zero
Therefore, you can say that this measurement has five significant figures
#811.40 ->#five significant figures