Answer:
a=21.2
n=√29
Step-by-step explanation:
x=120 is the answer it is hard to described without name
To fine the surface area is to add all the area of the faces
I don't know so sorry!
c(t)=40:0≤t≤400
=40+0.50 (t-400):t≥400
m=2
I calculated it sorry