Most real number arithmetic is pretty vacuous

That's about as good a way as possible to write this particular real number. But it's far from the only way.

so

Sometimes you can factor something out and you have a common radical:

But most of them are vacuous,

It’s A because I did the test lmafo
Answer:
How though?
Step-by-step explanation:
Because she had the $12 dollars on their but she can only use it at a certain store
I would say that it is 81. I hoped this helped and the steps are first what is 16 divided by 2 is 9 then you do 9 times 9 witch is 81.