Answer:
Good Morning
:)
Step-by-step explanation:
 
        
             
        
        
        
So, here we have an exponential function.
Remember that an exponential function has the form:

Where a represents an initial amount, and r is the rate of this amount to change. (Increase, or decrease).
So, given that the population of City A in 2000 was 40 thousand people and the population increased by 13% each year, we can say that 

So, 

For city B:

But something different happens with city C. This is not an exponential function, this is a linear function.
So,

 
 
        
             
        
        
        
1/3(12x-24)=16
*3                  *3
12x-24=48
      +24  +24
12x=72
/12   /12
x=6
        
                    
             
        
        
        
<span>9x^2 - 12x + 12
Hope it helps! (:</span>
        
                    
             
        
        
        
Answer is Rachel worked 3 2/3 hours
Step by step
Dominic worked 2 3/4 hours
Rachel worked (1 1/3) times (2 3/4)
1 1/3 x 2 3/4. Change into an improper fraction 
4/3 x 11/4. multiply across
44/12
Simplify
= 3 2/3