3 of them.
The number 30.4 has THREE significant figures.
304
3 of them.
0.7 has one significant figure. Any non-zero digit is significant (165 has three significant figures). Any zero between non-zero digits is significant (304 has three significant figures). Any zero to the right of a non-zero digit in a number which includes a decimal point is significant (10,000 has one significant figure, .0001 has one significant figure, but 100.0 has four significant figures, as does 0.001000). In this case, only the 7 is significant.
Four. The number of significant figures in any number is found by counting the number of digits starting with the first non - zero digit (eg 0.12 has 2 sig figures, 304 has 3 sig figures.)
3 significant figures.
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
Two significant figures. A significant figure is any non-zero digit or any embedded or trailing zero. Leading zeros are not significant.
Six significant figures. A significant figure is any non-zero digit or any embedded or trailing zero. Leading zeros are not significant.
Five significant figures. A significant figure is any non-zero digit or any embedded or trailing zero. Leading zeros are not significant.