Read the length of the metal bar with the correct number of significant figures.
A)20 cm
B)15 cm
C)15.0 cm
D)15.00 cm
E)15.000 cm

Question

Read the length of the metal bar with the correct number of significant figures. 
A)20 cm 
B)15 cm 
C)15.0 cm 
D)15.00 cm 
E)15.000 cm

Quizplus · Accepted Answer

The given value in the question is very precise, as there are more than 10 digits after the decimal point. Therefore, we can assume that the bar length is known with at least three significant figures. Thus, the answer choices A and B with only two significant figures are not precise enough. Answer choices C and E with four and five significant figures, respectively, are too precise for the information given in the question. Answer choice D with three significant figures is the best choice as it provides an appropriate level of precision without being too precise.

Read the Length of the Metal Bar with the Correct