At an effective annual interest rate i, the present value of $10 per year, payable at the beginning of each year for ten years, is $67.60. At the same interest rate, the accumulated value at the end of ten years of a single payment now of $10 is $25.94. In which of the following ranges is this accumulated value (still at this same interest rate) at the end of twenty years of $10 per year, payable at the end of each year? Possible Answers A $600 but $650 but