How many significant figures are justified in a measurement of a length that is between 9 and 10 centimeters if the measuring device (ruler)has smallest divisions of 0.1 cm?
A)one
B)two
C)three
D)four

Question

Quizplus · Accepted Answer

The smallest division on the ruler is 0.1 cm, so the measurement can only be reported to the nearest 0.1 cm. Since the measurement is between 9 and 10 cm, the only significant figure is the 9.

How Many Significant Figures Are Justified in a Measurement of a Length