Answer
0.002$0$m; cross out the first 3 zeroes and underline the last zero
Significant zeroes above are bold.
Work Step by Step
The first 3 zeroes are insignificant because they are leading zeroes (zeroes in front of a non zero number that serve as a place holder). The last zero is significant because it is a trailing zero (to the right of a non-zero number after a decimal point).
