How many of the zeros in the measurement 0.050 060 m are significant?

In the measurement 0.050 060 m, there are four significant zeros. The leading zeros (0.0) are not significant, but the zeros between the non-zero digits (5 and 6) and the trailing zeros (60) after the decimal point are significant. Therefore, the significant figures in this measurement are 5, 0, 0, 6, and 0, totaling five significant figures.