Task: Question Answering
Input (English): Problem: money invested at x %, compounded annually, triples in value in approximately every 112 / x years. if $ 2000 is invested at a rate of 8 %, compounded annually, what will be its approximate worth in 28 years ?
Options: a. $ 3,750, b. $ 5,600, c. $ 8,100, d. $ 18,000, e. $ 22,500
Output (English): d