Answer:
First figure out how many cups are in a gallon. 16 .
Next multiply 16×3= 48
Finally you divide price per cup or 20.16/ 48. 
The cost is .42 cents per cup. 
 
        
                    
             
        
        
        
Xiao was mistake because 3(20+30) still can divide by 10. The sum is 30(2+3)
        
             
        
        
        
I took it 9th grade last year, what’s up?
        
             
        
        
        
Answer:
5625in²
Step-by-step explanation:
Area of the plate = πr²
625π = πr²
625 = r²
r = √625
r = 25in
If the radius of the plate is tripled, then the new radius will be 3(25) = 75in
New Area = π(75)²
New Area = 5625π in²
If the radius is tripled, the new area of the plate is 5625in²