how lots of significant figures are in the

Question

How lots of significant figures are in the following measurements?

a. 0.002 849 kg

b. 40 030 kg

Imply rules 1-4 from above. Verify your answers by writing the quantities in scientific notation.

a. 0.002 849 kg has four significant figures 2.849 * 10^-3

b. 40 030 kg has four significant figures 4.003* 10⁴