Rob invests $2856 in a retirement account with a fixed annual interest rate of 5% Compounded 2 times per year. What will the account balance be after 13 years.

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.