I set this up as an inequality,

. If you take the cubed root of 800, you get the lower bound of the side length, which is 9.2. Then I just worked my way up until I hit the first number that put me over a volume of 800. That number is 9.29, because 9.28 cubed is 799.1 (not high enough) and 9.29 cubed is 801.8. Therefore, the bounds of the sides exist within a conjunction:

. That's the best I could come up with to help on that one. Wasn't sure if there was another method you were taught at school. I just used common sense more than any rule.
Answer:
288 I think
Step-by-step explanation:
24 hours each month. Each year has 12 months so 24x12=288
Answer:
Just fail it.
Step-by-step explanation:
Sleep in class
Talk to friends
Get put into e2020 and get ALL the answers off of here.
I simplified it to, 2x^2 - 12+13