Question

How many significant digits are in this number? 4,000,000?

Answer 1

There is only 1 significant digit because the zeros aren't cornered by other numbers so four is the only one.

Answer 2

just one which is the 4 but you have to put the zeros in because if you won 4,103,002 on the lottery you would say oh i won 4 million you wouldn’t say i won 4