Which measurement has three significant figures?

0.015 m

105 m

150 m

1.050 m

Also, 120.00 has five noteworthy figures since it has three trailing zeros. This tradition illuminates the accuracy of such numbers; for instance, if an estimation exact to four decimal spots (0.0001) is given as 12.23 then it may be comprehended that lone two decimal spots of exactness are accessible.