C. 15 is the answer i believe
        
             
        
        
        
Total amount borrowed by college student = $ 2,000
Total interest paid = $123.75
Total amount the student has to pay = $2,000 + $123.75
= $2123.75
Total duration for which the amount is borrowed = 9 months
Total amount he has to pay back in 1 month = 
= $235.9
Therefore, Amount he has to pay in 1 month = $235.9
 
        
             
        
        
        
Since 

 we know our function is 

.
To solve, substitute the given value:
 
 
        
        
        
60/125 or 12/25 is the answer reduced or 48% chance.
        
                    
             
        
        
        
we have: 
 => 6 ÷ 11 = 12 ÷ AB
 => AB = 12 × 6 ÷ 11 = 72/11 ≈ 6,5
Answer: 72/11 ≈ 6,5
P/s: CA = CD + AD = 6 + 5 = 11
Ok done. Thank to me :>