The population of the study is the 30 bottles of mustard that were selected
        
             
        
        
        
I got the answer 8x^3+1 by putting the values in the above formula
        
                    
             
        
        
        
First of all, let's find the water tank total amount 
according to the exercice, there were 2 L (L =liters) of water at 6 am (6hours after midnight ).
Consider T as total amount of water 
so we have 
T=(6×2)+2=14 as we already know it's emptying 2 L per hour 
y=14-2x , here is the equation !
        
             
        
        
        
The answer is 197. 
1 and 2 = 3 
3+2=5
3+3=6
6x0=0
24x8=192
5+0=5
192+5=197
        
             
        
        
        
256.
EXPLANATION:
When you are using exponents, you are basically just doing repeated multiplication.
Whatever the exponent (smaller number is) is how many times you multiply the base number by itself.
So 4 ^4 is 4 x 4 x 4 x 4. (4 fours.)
So 4 x 4 x 4 x 4 is 256. 
HAVE A GUD DAY