1) As many as you need for a particular purpose.
2) In any case, since this number is probably the result of some calculation, the answer should not look more accurate than what is justified by the original data. For example, if you multiply two numbers, one with 4, one with 5 significant digits, the answer should not have more than 4 significant digits.
Chat with our AI personalities
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
There are 4 significant figures to be reported.
The number 5321 has 4 significant figures.
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
2. The least number of significant figures in any number of the problem determines the number of significant figures in the answer.