3. find the volume of the sphere. (6cm)
36π cm3
12π cm3
288π cm3
864π cm3
4. find the best approximation of the volume of the sphere. (28cm)
3660 cm3
11,500 cm3
92,000 cm3
6470 cm3

The volume of any sphere is (4/3) (pi) (sphere's radius)³ .

Number 3:

If that "6cm" in parentheses is the sphere's diameter, then its radius is 3cm,
and its volume is 
                         (4/3) (pi) (27) = 36π cm³ .

If that "6cm" in parentheses is the sphere's radius, then its volume is

                       (4/3) (pi) (216) = 288π cm³ .

Number 4:

If that "28cm" in parentheses is the sphere's diameter, then
its radius is 14cm, and its volume is 
                                                      (4/3) (pi) (2744) = 3,858π cm³ .
The best estimate is 11,500 cm³ .

If that "28cm" in parentheses is the sphere's radius, then its volume is

                       (4/3) (pi) (21,952) = 29,269-1/3 π cm³ .

The best estimate is 92,000 cm³ .