Answer:
A=616cm²
Step-by-step explanation:
The question says to use

for pi, now that we know that we proceed like normal and do the formula like this.

Answer:
the answers are:x1=-4 and x2=5
Answer:
I would say B
Step-by-step explanation:
I think
It would be 6 because it it under .5 so you wouldn't round up