5
If the measurement was of such precision that the zero to the right of the 3 could be measured with accuracy, then it has two significant digits {30}.
There are 2 significant digits in the number.
Three significant digits.
This number has seven significant digits.
5 of them.
5
There is 1 significant figure in this measurement.
The term for eliminating digits that are not significant is called rounding or truncating. This process involves reducing the number of digits in a calculation to match the precision of the measurement.
the precision of the answer must have the same number of significant digits as the measurement with the least significant digits- the site explains the rules and how to identify significant digits
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.
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.
Five dogs can be considered to have an unlimited number of significant digits because the zero after the decimal point can be considered significant. As a result, the number 5.0 dogs has an indefinite number of significant digits.
The number of significant figures in 0.001580 g is five because all the non-zero digits are significant, and the zero positioned in-between non-zero digits is also significant.
When multiplying numbers with different numbers of significant digits, the result should have the same number of significant digits as the least precise measurement. Count the number of significant digits in each number, perform the multiplication as usual, and then round the result to the least number of significant digits used in the calculation.