The given formula is

Therefore

Given:
C = $25,000
V = $12,000
t = 4.5 years
C/V = 0.48
1/t = 0.2222
Therefore

Answer: 15% (nearest integer)
8-3(2)
8-5
=3
the answer should be 3 after plugging in the variables.
If f(x)=2x-1 just plug in the 3 where x is. So it would be 2(3)-1=5