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.
There are 4 significant figures to be reported.
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.
The accuracy of the measurement device determines the number of significant figures that should be retained in recording measurements.
The accuracy of the measurement device determines the number of significant figures that should be retained in recording measurements.
142.617 has 6 significant figures and should not be confused with the number of decimal places to which the number is given which is 3dp. To 5 significant figures, the answer is 142.62 To 4 significant figures, the answer is 142.6 To 3 significant figures, the answer is 142 To 2 significant figures, the answer is 140 (the final zero is retained to indicate the position of the decimal point which , if shown, would be 140.0 To 1 significant figure, the answer is 100
The number of significant figures should be equal to the significant figures in the least precise measurement.
There are 4 significant figures to be reported.
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.
Three, so the answer would be 3.96. Always use the number with the smallest amount of significant figures to determine the amount of significant figures will be in the solution.
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.