The measurement 5.130 $\times$ 10^-4 has _____ significant figures. A)two B)three C)one D)seven E)four

Question

Quizplus · Accepted Answer

The significant figures in a measurement are determined by the number of digits that are reliable and certain, plus one estimated digit. In this case, all the digits before the decimal point are reliable and certain, so they all count as significant figures. The zero after the decimal point is also a significant figure because it indicates that the measurement was made to the nearest 0.1 unit. Therefore, there are four significant figures in this measurement: 5.130.

The Measurement 5 ×\times× 10-4 Has _____ Significant Figures

The Measurement 5 $\times$ 10^-4 Has _____ Significant Figures