Up to the significant figures introduction.
Let us suppose that gold is selling today for $25.06 per gram.
 | This is a 4-decimal balance. It is a high precision and very expensive instrument. It can measure extremely small changes in the amount of gold in the balance pan. |
On the 4-place balance, the gold weighs 1.6431 g.
There are 5 significant figures in our measurement.
The gold is worth
A similar example
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