The equation for the total amount after compounded interest is as follows:

Where A is the final amount, P is the initial amount, r is the annual interest, n is how many times per year the interest is compounded and t is the time in years.
Since the interest is compounded annually, it is compounded only once per year, so

The other values are:

So, substituteing these into the equation, we have:

So, she will have approximately $6421.