Significant Figures In Calculation

Which of the following rules regarding the significant figures and calculations involving them is not correct?

Which of the following rules regarding the significant figures and calculations involving them is not correct?

(a). Calculate the area enclosed by a circle of radius 0.56 m to the correct number of significant figures. (b) . Calculate the area enclosed by a circle of diameter 1.12 m to the correct number of significant figures.

(a). Calculate the area enclosed by a circle of radius 0.56 m to the correct number of significant figures. (b) . Calculate the area enclosed by a circle of diameter 1.12 m to the correct number of significant figures.

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