The answer to this question is 27/28
        
             
        
        
        
9514 1404 393
Answer:
   8000π mm^3/s ≈ 25,133 mm^3/s
Step-by-step explanation:
The rate of change of volume is found by differentiating the volume formula with respect to time.
   V = 4/3πr^3
   V' = 4πr^2·r'
For the given numbers, this is ...
   V' = 4π(20 mm)^2·(5 mm/s) = 8000π mm^3/s ≈ 25,133 mm^3/s
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<em>Additional comment</em>
By comparing the derivative to the area formula for a sphere, you see that the rate of change of volume is the product of the area and the rate of change of radius. This sort of relationship will be seen for a number of different shapes.
 
        
             
        
        
        
Answer:
Step-by-step explanation:
90/2 is proportional to 45
 
        
             
        
        
        
Answer:
8.0x
Step-by-step explanation: