Four - the last zero is not significant.
* * * * *
Unfortunately, that is not true. Integers ending in 0 are ambiguous cases.
It is not possile to tell whether the number is accurate to the nearest integer (5 sig digs) or rounded to the nearest 10 (4 sig digs).
36.8 pentameters has three significant digits.
3 significant digits because first zeros are just placeholders
There are four significant digits in the number 6.741.
There are 3 significant digits in 4.00 and 2 significant digits in 7.0. Zeros between non-zero digits or at the end of a number after a decimal point are considered significant.
The number 42.31 pounds has four significant digits.
5 of them.
Five
4
It has two significant digits.
It has 3 significant digits.
3 significant digits.
Five. All nonzero digits are significant and zeros in between significant digits are significant.
Five. All nonzero digits are significant and zeros in between significant digits are always significant.
Five. All nonzero digits are significant and zeros in between significant digits are always significant.
Five. All nonzero digits are significant and zeros in between significant digits are always significant.
50.4 has 3 significant digits.
There are 4 significant digits in 5600.