Respostas

  • Usuário do Brainly
2014-04-14T22:05:48-03:00
A)
A=4πr²
A=4.π.7²
A=4.π.49
A=196πcm²

b)
V=4/3. πr³
V=4/3 .π.7³
V=4/3.π.343
V=1372π/3 cm³