Once they're empty, I guess.
Did you put it the wrong way around?
Because it would be after four hours in this case.
Answer:
Greater, Less than, Greater
Step-by-step explanation:
Remember anything close to zero will always be greater in negative numbers. Example. -1>-2. Negative one is greater since it it closer to zero than 2.
I'm Pretty Sure The Answer Is 31
-3z^7 - (-5z^7) = -3z^7 + 5z^7 = 2z^7