1.calculer air of a sphere of radius 7 cm, giving an exact value and an approximate value mm caré 2.calculer the volume of the ball of radius 7 cm, giving an exact value and an approximate value mm cube

The volume of a sphere is  (4/3) (pi) (radius)³ .

If the radius is 7cm, then the volume is

                                           (4/3) (pi) (7³)  = 

                                           (4/3) (pi) (343)  = 

                                            (457 and 1/3) (pi) cm³  (exact)

                                               1,436.76 cm³            (rounded)

Yea they are simplyfiy the ratios