How many of the following numbers contain 3 significant figures? 0.509 9.040 0.0300 7.03 × 10²⁴ A) one B) two C) three D) four

Question

Quizplus · Accepted Answer

The numbers with 3 significant figures are:
0.509
9.04
0.0300 (the trailing zero after the decimal point counts as a significant figure)
7.03 × 10¹² (scientific notation only counts non-zero digits as significant figures, and there are three non-zero digits: 7, 0, and 3)

How Many of the Following Numbers Contain 3 Significant Figures