Significant Figures in Calculations

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.

Significant Figures In Addition & Substraction|Significant Figures In Multiplication & Division|Remembering Technique

Recap|Significant Figures|Rounding Off|Rules For Rounding Off|Significant Figures In Addition And Subtraction|Significant Figures In Multiplication And Division|Important Points|Summary

The number of significant figures in 3400 is

The number of significant figures in 0.07 is

The number of significant figures in 45056 is

The number of significant figures in 0.400 is