For a continuous compound interest we can use the formula:
[tex]A=Pe^{rt}[/tex]for the total amoun after t years. In this formula P is the principal (the initial investment), r is the interest rate in decimal form and t is the time, as we said, is the number of years. Plugging the values given we have:
[tex]A=2500e^{0.065\cdot4}=3242.33[/tex]Therefore after four years the account will have $3242.33