Socorro me ajuda com urgência gente pfvr ( se nao sabe nao res...

Boa tarde!

Considerando π = 3,14

1) A = π . R²

A = π . (4)² > A = π . 16 cm > A = 50,24 cm

2) C = 2. π . R

16 π = 2 . π . R --->  R = 8 cm

A = π . R²

A = π  . (8)² > A = π . 64 cm ---> A = 200,96 cm

3) A = π . R²

70650 = π . R²

70650 / 3,14 = R²

22500 = R²

R = √22500 > R = 150 m