1.a sphere with a radius of three units
By definition, the volume of a sphere is:

Substituting values we have:

Rewriting we have:
2.a cone with a diameter of twelve units and a height of three units
By definition, the volume of a cone is given by:

Substituting values we have:

Rewriting we have:
Answer:

Step-by-step explanation:
1) Add the whole numbers first.

2) Join the denominators.

3) Simplify.

hence, the answer is 3 4/5.
Answer: the first one is the answer I think
Step-by-step explanation: