To find the answer to this question, we must first work out what 13% of $4,500 is. To do this, divide $4,500 by 100 to get $45. Then, multiply 45 by 13 to get $585. $585 x 7 is $4,095, so this is the amount you will have at the end of seven years. This is of course assuming that this is simple interest rather than compound interest, as that would require a very different process to figure out.