Task: Question Answering
Input (English): Problem: if x is invested in a bank at a rate of simple interest of y % p. a. for two years, then the interest earned is 800. if x is invested at y % p. a., for two years when the interest is compounded annually, the interest is 820. what is the value of x ?
Options: a. 8000, b. 6000, c. 5000, d. 4000, e. 3000
Output (English): a