Which of the following statements about significant digits are TRUE? I.Significant digits are only the digits that are known exactly.
II)Significant digits are all of the digits that are known exactly plus one uncertain digit.
III)Significant digits are a way to communicate the precision of a measurement.
IV)The degree of uncertainty of a measurement is expressed by significant digits.
A) I only
B) II only
C) III and IV only
D) II, III and IV
E) All of the statements are true about significant digits.

Question

Quizplus · Accepted Answer

Statements II, III, and IV are correct. Significant digits include all known digits plus one estimated digit, indicating the precision of a measurement and the degree of uncertainty. Statement I is incorrect because significant digits are not only the digits known exactly but also include one uncertain digit.

Which of the Following Statements About Significant Digits Are TRUE