Answer:
16 ?
Step-by-step explanation:
6x-6=8x
subtract 6x from both sides
-6=2x
divide both sides by 2
x= -3
I really think your is 12 feet and 2 inches
A function is positive if it lies above the x axis.
This function is positive before x = -4, i.e. over the interval 
It is negative elsewhere, i.e. over the interval 
So, the only correct option is the second one.