f(x) is going down by 4
step-by-step explanation:
(its either that or its going left by 4)
really really sorry if i'm
-12 -5(x + 4) = 3x
-12 - 5x - 20 = 3x
-12 - 20 - 5x = 3x
-32 - 5x = 3x
+ 5x + 5x
-32 = 8x
8 8
- 4= x
the answer is b.
64
c=2πr=2·π·8≈64