Answer:
12. B , 13. 4
Step-by-step explanation:

(n^4 - 1) = (n^2 - 1) (n^2 +1) = (n - 1) (n + 1) (n^2 + 1)
Answer:
pppkmfk
Step-by-step explanation:
225nvinf jfvvi
dv
t
4w
5
4
346
So first you should find the area of the rectangle on the bottom.
18x12=216
Then find the area of the trapezoid. I believe the formula is A = a+b/2(h).
So do 10 + 18 = 28, divide by 2, which is 14, then multiply by the height, 6, and you get 84.
Now you add the area of both shapes together, 216+84=300.
300 ft is your answer.
If you have questions lmk