How many significant digits are in 4030?

Answer 1

Well, honey, let me break it down for you. The number 4030 has three significant digits because the zeros are sandwiched between non-zero numbers. So, count 'em up and you'll see that there are three digits that actually matter in this number. Hope that clears things up for ya, darling!

Answer 2

Integers ending in 0 are always ambiguous. It is not possible to tell whether this number is accurate to the nearest tens (3 significant figures) or to the nearest integer (4 significant figures).

Answer 3

3 of them.