To find the annual profit when the pizza shop owner sells 350 pizzas, we need to substitute \( n = 350 \) into the profit function \( p(n) = 32n - 0.04n^2 \).
First, we calculate \( 0.04n^2 \): \[ 0.04 \times 350^2 = 0.04 \times 122500 = 4900 \]
Next, we calculate \( 32n \): \[ 32 \times 350 = 11200 \]
Now we can substitute these values into the profit function: \[ p(350) = 32 \times 350 - 0.04 \times 350^2 \] \[ p(350) = 11200 - 4900 \] \[ p(350) = 6300 \]
Thus, the annual profit if the pizza shop owner sells 350 pizzas is \( \mathbf{6,300} \).
The correct answer is \( \text{D: } 6,300 \).