(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.

Answer

`~ 0.99 m^(2)`

Explanation

`A = pi r^(2) = (22)/( 7) ( 0.56)^(2) = 0.9856 m^(2) ~ 0.99 m^(2)`
(two significant figures)