(Spreadsheet problem) In 23 years, you'd like to have $400,000 to buy a vacation home, but you have only $55,000. At what rate must your $55,000 be compounded annually for it to grow to $400,000 in 23 years? Use a spreadsheet to calculate your answer. The interest rate at which your $55,000 must be compounded annually is \%. (Round to two decimal places.)