Respuesta :
Answer: 3 significant figures
Explanation:
Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.
Rules for significant figures:
Digits from 1 to 9 are always significant and have infinite number of significant figures.
All non-zero numbers are always significant.
All zero’s between integers are always significant.
All zero’s preceding the first integers are never significant.
All zero’s after the decimal point are always significant.
The rule apply for equations involving both addition and division is the least precise number present after the decimal point determines the number of significant figures in the answer.
Average of weights = [tex]\frac{\text {sum of all weights}}{\text {number of measurements}}=\frac{4.04+3.9520+4.065}{3}=4.02[/tex]
Thus the average value of 4.02 has three significant figures as the least precise value of 4.04 has three significant figures.
