Answer:
54 cubic inches?
Step-by-step explanation:
Answer:
they can??!!!
Step-by-step explanation:
omigod wowoow
It's closed under addition. You can take any two natural numbers you want, add them up and you'll get some other natural number (eg: 3 and 5 ---> 3+5 = 8)
it's not closed under subtraction. Sure 5-3 = 2 is a natural number but 3-5 = -2 is not a natural number
so that leads us to the answer being choice B
