Respostas

2014-01-05T02:37:47-02:00
Vesfera = 4 . π . R³  / 3

R = 75 cm

V = 4 .π . 75³ / 3 
V = 562500 π cm³

b) Vesfera = 4 . π . R³  / 3 
 
Considerando π = 3

  2000 = 4 .3. R³ / 3

2000 . = 4 .3 .R³ / 3

2000 /  4  = R³
500 = R³

R = ∛ 500 ≈ 7,93 cm