Answer:
B. r=7.5 
yan po ang correct answer
 
        
             
        
        
        
Answer:
1947.78 inches or 162.31 feet. 
Step-by-step explanation:
the circumference of any given circle is its diameter times pi. So, if you multiply the diameter times pi and then the circumference by 10 you get the number of inches traveled, if you divide that by 12 you get the number of feet traveled. 
 
        
                    
             
        
        
        
first, find the square root of 45. and make x normal. a square root cancels out a square. It should be 6.7x
 
        
             
        
        
        
The rule is division since the number is being divided by 5 repeatedly