10/2 so 5 for 53, 10/4 so 5/2 or 2.5 for 54, and 10/3 or 3.333. For simplicity i divided everything by 10 to remove an extra zero but the answers would still be the same after you reduced
        
             
        
        
        
Answer:
8.8%
Step-by-step explanation:
you have ( $150 / $1695 ) * 100 = 8.8
 
        
             
        
        
        
Let 

. Then 

 and 

 are two fundamental, linearly independent solution that satisfy


Note that 

, so that 

. Adding 

 doesn't change this, since 

.
So if we suppose

then substituting 

 would give

To make sure everything cancels out, multiply the second degree term by 

, so that

Then if 

, we get

as desired. So one possible ODE would be

(See "Euler-Cauchy equation" for more info)