The answer to this is negative
        
             
        
        
        
Answer:
 --- function
 --- function
The monthly rate is 10%
Step-by-step explanation:
Given
Let

 
So, we have:
 --- Monday
 --- Monday
 --- One month later
 --- One month later
Required
The function
The function is represented as:
 
In  , we have:
, we have:




In  , we have:
, we have:


Substitute: 

Solve for b


So, the function is:


To calculate the monthly rate (r), we have:

Compare to: 

Make r the subject

Substitute 


Express as percentage


 
        
             
        
        
        
You multiply length times width or base times height.