19.20 divided by 7.5
= 2.56
2.56 is your answer.
        
             
        
        
        
Answer:
The lesser number of workbooks are 1,000
Step-by-step explanation:
The correct question is
The profit P (in thousands of dollars) for an educational publisher can be modeled by P=-b³+5b²+b where b is the number of workbooks printed (in thousands). Currently, the publisher prints 5000 workbooks and makes a profit of $5000. What lesser number of workbooks could the publisher print and still yield the same profit?
we have
 
  
For 
substitute in the equation and solve for b
Remember that the profit and the number of workbooks is in thousands
so
P=5

Using a graphing tool
Solve the cubic function
The solutions are 
x=-1
x=1
x=5
therefore
The lesser number of workbooks are 1,000
<u><em>Verify</em></u>
For b=1
 
  
 -----> is in thousands
  -----> is in thousands
so
 ----> is ok
 ----> is ok
 
        
             
        
        
        
Answer:
Step-by-step explanation:
 
        
                    
             
        
        
        
The answer for this question is 37/40