Is it 1 2 3 or 4

Which of the following scenarios matches the function f(x) = 500(1.04)x?  

1.The cost of 500 bumper stickers that cost $1.04 each

2.The total amount of money on a $500 investment with a 4% annual interest

3. The number of rabbits bred each year at a growth rate of 104%

4.The amount paid in sales tax on a $500 stereo in a state with 4% sales tax