Lemme explain, im a middle schooler and my school just jumped into this with no explanation.​

the first question is c

Step-by-step explanation:

2 x pi x the radius

2 x 3.14 x 8

step-by-step explanation:

options

for this pair of functions g(x)=x-2 and f(x)=|x| is (g o f)(a)= |a| -2

step-by-step explanation:

g(x)=x-2

f(x)=|x|

(g o f)(a)=?

(g o f)(x)=g(f(x))

(g o f)(x)=g(|x|)

(g o f)(x)=|x|-2

(g o f)(a)=|a|-2