One
One.
Five. All nonzero digits are significant and zeros in between significant digits are significant.
There are 600 thousands in 600,000. Each comma in a numerical value represents a grouping of three digits, so in this case, there is one grouping of three zeros, which equals one thousand.
Three significant digits.
There are five significant digits.
One.
4
It has 3 significant digits.
3 significant digits.
It has two 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.
Three significant digits.
50.4 has 3 significant digits.
There are 3 significant digits in 20.0