1. **State the problem:** Tori's family needs to travel 325 miles. They drive 3 hours in the morning and then stop for lunch. Their average speed for the whole trip is 50 miles per hour. We need to find how many hours they will drive in the afternoon. 2. **Formula used:** The total distance traveled is given by $$\text{Distance} = \text{Speed} \times \text{Time}$$ 3. **Calculate total time for the trip:** Since average speed is 50 mph and total distance is 325 miles, total time $$T$$ is $$ T = \frac{\text{Distance}}{\text{Speed}} = \frac{325}{50} = 6.5 \text{ hours} $$ 4. **Calculate afternoon driving time:** They drive 3 hours in the morning, so afternoon driving time $$t_a$$ is $$ t_a = T - 3 = 6.5 - 3 = 3.5 \text{ hours} $$ 5. **Answer:** They will drive **3.5 hours** in the afternoon.