Question

need checked please formula given is A=3.14r^2 (r=12.5mm) so i plugged stuff in A=3.14(156.25mm) A=490.625mm^3? need checked please formula given is A=3.14r^2 (r=12.5mm) so i plugged stuff in A=3.14(156.25mm) A=490.625mm^3? @Mathematics

Answer 1

= 490.62mm^2

Answer 2

ty

Answer 3

You did the arithmetic correctly: 490.625, but the units are mm^2. If you wrote the problem as A= 3.14(12.5 mm)^2 and then square everything (including the units), you would get
A= 3.14 (156.25 mm^2), or
A= 490.625 mm^2