One - the four. None of the trailing 0s are significant digits.
4 significant digits.
Without the decimal point, there is only a significant figure.
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.
4000000
Just the one and it is 4
One - the four. None of the trailing 0s are significant digits.
1 significant figure.
1 significant figure.
4
It has two significant digits.
3 significant digits.
It has 3 significant digits.
4 significant digits.
Five. All nonzero digits are significant and zeros in between significant digits are significant.
Without the decimal point, there is only a significant figure.