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Question about Dubious Figures

Mathematics

Originais Teachy

Dubious Figures

Hard

(Originais Teachy 2025) - Question Hard of Mathematics

Maria used a ruler marked in centimeters to measure the width of a wooden board. She noted the measurement as 12.3 cm. Considering that the ruler may not be perfectly accurate because of the limited precision of the markings, what is the range of values that reflects the true width of the board?
a.
The true width of the board is between 12.35 cm and 12.50 cm.
b.
The true width of the board is between 12.25 cm and 12.35 cm.
c.
The true width of the board is between 12.20 cm and 12.40 cm.
d.
The true width of the board is between 12.15 cm and 12.45 cm.
e.
The true width of the board is between 12.25 cm and 12.30 cm.

Answer sheet:

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