Calcule as potencias a seguir. a)5³ b)(-2)⁷ c) (-3)‐⁴ d) 20⁰ e) (-0,4)³ f) (2/3)³ g) (2,5)‐² h) (1/2)‐⁴ i) (3,7)⁰ resposta ?​