Final answer:
To find the present worth of the gold mine, we need to calculate the present value of each year's production using the effective annual interest rate of 4%.
Step-by-step explanation:
To find the present worth of the gold mine, we need to calculate the present value of each year's production using the effective annual interest rate of 4%. We can use the present value formula:
Present Value (PV) = Cash Flow / (1 + Interest Rate)^n
For Year 1, the present value is calculated as $30,000 / (1 + 0.04)^1 = $28,846.15.
Continuing this calculation for all 8 years and summing up the present values, we get a present worth of approximately $132,746.70.