A student is calculating the thickness of a single sheet of paper. She measures the thickness of a stack of 80 sheets with vernier calipers, and find the thickness to be 1.27cm. To calculate the thickness of a single sheet she divides the total thickness of sheets with number of sheets. Which of the following answer has the correct number ofsignificant digits?

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0.15875 mm

0.159 mm

0.16 mm

0.2 mm

answer is B.

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Detailed Solution

1.2780=0.159.

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