Final answer:
To find the present value of the renovations, use the present value formula. To find the deposit rate, use the continuous deposit formula.
Step-by-step explanation:
To find the present value of the renovations, we need to calculate the amount of money needed in the present that will grow to $700000 in four years at a 10% interest rate. We can use the formula:
Present Value = Future Value / (1 + Interest rate)^Number of years
Plugging in the values, we have:
Present Value = 700000 / (1 + 0.10)^4 = $508520.73
To find the rate at which money should be deposited continuously, we can use the formula:
Rate = Ln(Future Value / Present Value) / Number of years
Plugging in the values, we have:
Rate = Ln(700000 / 508520.73) / 4 = 0.0736 dollars per year