Need help with math homework

Suppose $3000 is invested annually into an annuity that earns 7% interest. If P dollars are invested annually at an interest rate of r, the value of the annuity after n years is given by the following equation. How much is the annuity worth after 11 yr? W = P (1 + r)n - 1 r The annuity will be worth $ (Do not round until the final answer. Then round to the nearest cent as needed.)