Is means =
less than is subtract
1/2a -8=2
if you need to know how to do it let me know
Check the picture below. Recall, is an open-top box, so, the top is not part of the surface area, of the 300 cm². Also, recall, the base is a square, thus, length = width = x.

so.. that'd be the V(x) for such box, now, where is the maximum point at?

now, let's check if it's a maximum point at 10, by doing a first-derivative test on it. Check the second picture below.
so, the volume will then be at
Answer:
0.15
Step-by-step explanation:
I don't know if that is right but sorry if it is wrong but I would check with your teacher or someone for help
Answer:
b is answer?
Step-by-step explanation:
feels right
X + 20 <= -10
Subtract 20 from both sides:
X <= -30