Answer:
45 degrees 
Step-by-step explanation:
AOB = 140°
and an the angle bisector(OC) is a line which will divide AOB into 2 equal angles 
which is 140÷2= 70
and if AOD = 25 then COD= 70-25
= 45 degrees
hope it helps
 
        
             
        
        
        
He will have 7.75 left from the 20 dollar bill he spent