Answer:
156 000: 3 significant figures
Explanation:
The rules to identify the correct number of significant figures in a number are:
- All the non-zero digits are always significant
- Final (trailing) zeros are only significant if they are after the decimal point
- All zeros between non-zero digits are significant
Now we can apply these rules to the given numbers:
156 000: 3 significant figures --> TRUE. Only 1, 5 and 6 are significant figures here.
0.00302: 2 significant figures --> FALSE. Here the significant figures are only 3, 0 and 2, so there are 3 significant figures
0.04300: 5 significant figures --> FALSE. Here the significant figures are 4, 3, 0, 0: so, 4 sign. figures.
3.0650: 4 significant figures --> FALSE. Here there are 5 significant figures: 3,0,6,5,0
1.04: 2 significant figures --> FALSE. Here there are 3 significant figures: 1,0,4
