How many significant figures does the following number contain: 385.01

5 significant figures

Explanation:

Zeros that come before any non-zero digits are never significant.Zeros that are in between any non-zero digits are always significant.Zeros that come after any non-zero digit are ONLY significant if a decimal point in present somewhere in the number. (In this case there is a decimal point, but there aren't any zeros at the end of this number.)

I have underlined the significant figures in this number:

3 8 5 . 0 1