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 metal bar measurement appears to have been taken with four significant figures. The number given in option D, 15.00 cm, also has four significant figures, which is the correct number of significant figures to use when recording measurements with this level of precision. Option E, 15.000 cm, includes one extra decimal place than what is appropriate for the given level of precision. Option C, 15.0 cm, lacks the necessary zero after the decimal point to convey accurate information about the measurement. Option B, 15 cm, omits the decimal point and any information about the level of precision associated with the measurement, which is also less accurate than option D. Option A, 20 cm, is not among the options that align with the information given and should be eliminated. Therefore, the best choice is option D.

Read the Length of the Metal Bar with the Correct