What is 0.003010 as a significant figure

The number has four significant figures

Another example is:

0.0009 kg has one sig fig. Zeros at the end of a number and to the right of a decimal are significant. 85.00 g has four sig figs; 9.000 000 000 mm has 10 sig figs.

I hope my answer has come to your help. God bless and have a nice day ahead!

Hello there.

What is 0.003010 as a significant figure

4 significant figures.