Final answer:
The yearly interest rate the investment is earning is 3%.
Step-by-step explanation:
The function F(x) = 1.69(1.03)x models the value of an investment, in thousands, after x years. To determine the yearly interest rate the investment is earning, we need to find the growth factor in the function. In this case, the growth factor is 1.03. This means that the investment is earning an annual interest rate of 3%.