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.
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
The number 5321 has 4 significant figures.
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.
2. 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.
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.
The number of significant figures in a measurement is determined by the precision of the measuring instrument. Include all certain digits plus one uncertain digit (estimated or interpolated). Nonzero digits, zeros between nonzero digits, and trailing zeros in numbers containing a decimal point are considered significant.
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
The number 5321 has 4 significant figures.
There are 4 significant figures to be reported.
You should report your answer to three significant figures because 6774m has four significant figures and 46m has two significant figures, so the least number of significant figures between the two numbers determines the number of significant figures in the product.
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
the measured quantity with the least number of significant figures. For example, if you multiply a quantity with 3 significant figures by a quantity with 2 significant figures, your result should have 2 significant figures.
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.