Final answer:
To cover the future balance of $921,000 over 30 years, the village should invest approximately $275,600 with an interest rate of 7.8% compounded monthly.
Step-by-step explanation:
To finance the balance of $921,000 in 30 years, the village should invest:
Step 1: Calculate the future value of the balance.
Future value = Principal x (1 + interest rate/compounding frequency)^(compounding frequency x time)
Future value = ($921,000 - $490,000) x (1 + 0.078/12)^(12 x 30)
Future value = $431,000
Step 2: Calculate the present value of the future value.
Present value = Future value / (1 + interest rate/compounding frequency)^(compounding frequency x time)
Present value = $431,000 / (1 + 0.078/12)^(12 x 30)
Present value = $275,600 (rounded to the nearest cent)
The village should invest approximately $275,600 to cover the future balance.