Answer:
n>19
Step-by-step explanation:
 
        
             
        
        
        
The area of the circle by definition is given by:
 
 For f (r) = 154: 

 Clearing r we have: 

 For f (r) = 616: 

 Clearing r we have: 
 Answer:
 Answer:
 a reasonable domain for f (r) is:
 7 <r <14
 
        
        
        
39.0 is the decimal for it
        
                    
             
        
        
        
70dB is represented by 100cars in 60sec. Therefore if the number of cats is reduced by 3/4 in the same amount of time(60s), then the decibel level will reduce by 3/4 also. So 70dB * .25= 17.5dB