I think b.3 i am not sure but it should be b
Graph b
The domain is (-inf,inf)
The range is [0, inf)
Hope this helps!
For this case we have by definition, that the volume of a sphere is given by:

Where:
r: It is the radius of the sphere
If the radius is divided by 3 we have:


ANswer:
the volume decreases considerably because the denominator increases
A=28.27 miles Sq
A= pie r2 = pie r.3 to 2nd power = 28.27 square miles