2,8 those are the ones that I know most and maybe 3 and 4.
4^5
4 is the base
5 is the power
Same as writing it like
4 x 4 x 4 x 4 x 4
Its C.125 is the correct answer...
Answer: 
Step-by-step explanation:
We see that g(x) is a straight line that passes through the origin, just like f(x), so g(x)=kx for some constant k.
Since g(x) passes through (4,2), we know that 2=4k, and thus k=1/2.
So, 
13 - (x+2) = 8
subtract 13 from both sides
-(x+2) = -5
divide by -1 to get rid of negative
(x+2) = 5
subtract 2 from both sides
x=3