Check the picture below.
let's recall that 2π is a full go-around or namely a revolution

 
        
             
        
        
        
Answer:
b
Step-by-step explanation:
$25 per day
it's "b" because as days increase the cost of dollars gets added by $25 per day.
Hope this helped!
 
        
             
        
        
        
Remember to incorporate Bimdas, into you calculation and ensure where the addition and subtraction occur you work from left to right.
 
        
        
        
1 lb = 16 oz
Translating the unit into oz gives us 
166oz - 123oz = 43oz or 2lb 11oz
        
             
        
        
        
9 times it will be 98 rhr