Final answer:
The weight of the mint stated on the label is 20.4 grams, which corresponds to option 1. The concept of measurement uncertainty and significant figures is important in understanding that every measured weight has a certain degree of precision.
Step-by-step explanation:
The question pertains to the weight of a certain type of mint. If the label states that it weighs 20.4 grams, then the answer is straightforward; the weight of the mint is 20.4 grams. This is option 1. When we measure objects, the weight displayed on the scale includes certain digits that we know for sure and usually a final digit that we estimate. This estimated digit gives us an idea that the true weight of the object lies within a small range defined by this uncertainty.
For example, when measuring with a standard electronic balance, if you weigh a quarter and it displays 6.72 g, then it is understood that the weight is approximately 6.72 grams with a nominal uncertainty of ± 0.01 gram. This implies that the actual weight of the quarter is likely between 6.71 and 6.73 grams. This concept highlights the importance of measurement uncertainty and significant figures in everyday measurements.