How many significant figures are in 50copies? (1).2 (2).1 (3).infinite...
Significant figures in 50copies
Explanation:
When we count the number of significant figures, we count all the digits that are known for sure plus one digit that is uncertain. In this case, the number 50copies is a count, and it is exact. Therefore, it has an infinite number of significant figures.
To understand this better, let us consider the following example:
Suppose we have a piece of paper that is 10.1cm long. In this case, the number 10.1 has three significant figures because we know for sure the first two digits (10) and the third digit (1) is uncertain.
But when we count the number of copies, we are not measuring a physical quantity. We are merely stating a count, and a count is always exact. For example, if you have three apples, you cannot have 3.1 apples or 2.9 apples. You have precisely three apples.
Therefore, the number 50copies has an infinite number of significant figures.
Conclusion:
When we count the number of copies, we are stating an exact count, and therefore the number has an infinite number of significant figures.