The volume of a sphere is (4/3) (pi) (radius cubed).
The volume of one sphere divided by the volume of another one is
 (4/3) (pi) (radius-A)³ / (4/3) (pi) (radius-B)³
Divide top and bottom by (4/3) (pi) and you have     (radius-A)³ / (radius-B)³
and that's exactly the same as
                                                         ( radius-A / radius-B )  cubed.
I went through all of that to show you that the ratio of the volumes of two spheres
is the cube of the ratio of their radii.
Earth radius = 6,371 km
Pluto radius = 1,161 km
Ratio of their radii = (6,371 km) / (1,161 km)
Ratio of their volumes =  ( 6,371 / 1,161 ) cubed = about <u>165.2</u>
Note:  
I don't like the language of the question where it asks "How many spheres...".
This seems to be asking how many solid cue balls the size of Pluto could be
packed into a shell the size of the Earth, and that's not a simple solution.
The solution I have here is simply the ratio of volumes ... how many Plutos 
can fit into a hollow Earth if the Plutos are melted and poured into the shell.
That's a different question, and a lot easier than dealing with solid cue balls.
        
                    
             
        
        
        
Answer:
$8.3
Step-by-step explanation:
Given
2.4 pounds of walnuts=$19.92
Solution 
the price per pound of walnuts=19.92/2.4
 =$8.3
Price of per pound walnuts is $8.3
 
        
             
        
        
        
Answer:
The probability is 2/6, or 1/3 (about 33%)
Step-by-step explanation: