First answer is brainiest Explain you're answer even if its just a bit because I'm tired of people giving me random answers so I fail its annoying.

D

Step-by-step explanation:

So you are looking for the inverse equation. The original can be written as y=1/2x-6. For the inverse, your variables switch places. It's reflecting across the line y=x (that's what the inverse does). So you write it as x=1/2y-6. Now solve for the new equation:

Move 6 over: x+6=1/2y

Isolate y: 2(x+6)=y

This gets you D.  

[D] f^-1(x) = 2(x + 6)

=> f(x) = 1/2x - 6

For inverse function, y = x

y = 1/2x - 6

y + 6 = 1/2x

2(y + 6) = 1/f(x)

2(x + 6) = 1/f(x)

the answer is 14ft

step-by-step explanation: