B because gradient of the first line is 4/-6 which is -2/3
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:
Yep! an open dot is <
A closed dot means ≤
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