Answer:
12
Step-by-step explanation:
12 divided by 3 is 4 and 4 times 3 is 12
I'm gonna go with triangular pyramid and a cylinder
Its 252,889 because when your taking 428,731 from 175,842 your subtracting the bigger number from the little number & if you take 252,889 and add it too 175,842 you get 428,731.