Real world example could be:
Consider x is time in minutes
Consider y is the amount of fish food required in grams
The equation could then represent how much food (in grams) that a fish needs to be fed x minutes after it was previously fed.
        
                    
             
        
        
        
37,000 , The 6 is closer to 10 than it is 0
        
                    
             
        
        
        
First question 
Volume = height * radius*radius*3.14 
5*3*3*3.14 = 141.3 in3 
Second qustion 
 Violume = height * radius * radius * 3.14 
28*8*8*3.14= 5626.88 cm3 
So the answer is 1875.63 because it's the closest
        
                    
             
        
        
        
The correct answer is 2a^2