All of them.
The significant digits are: 3701; so there are four such digits in the measurement. These are the digits that convey the degree of precision included. Leading zeroes and trailing zeroes do not add such meaning.
Three.
4 of them.
There are four.
There are 4 significant digits
There are seven (7) significant digits in 4032010.
Five
4
8 of them.
All of them.
The significant digits are: 3701; so there are four such digits in the measurement. These are the digits that convey the degree of precision included. Leading zeroes and trailing zeroes do not add such meaning.
1
4 of them.
5 of them.
3 of them.
Three.