Final answer:
By calculating Ross's average speed of 66 miles per hour, we find that Ross can drive 792 miles in 12 hours, assuming he maintains the same speed.
Step-by-step explanation:
Ross drives 396 miles in 6 hours. To find out how many miles Ross can drive in 12 hours, we need to calculate his average speed and then use that to find the total distance covered in 12 hours. First, we find the average speed by dividing the total distance by the time.
The average speed is:
Average speed = Total distance ÷ Time
Average speed = 396 miles ÷ 6 hours = 66 miles per hour.
Now, if Ross continues to drive at the same rate for 12 hours, we multiply the average speed by the new time:
Distance = Average speed × Time
Distance = 66 miles per hour × 12 hours = 792 miles.
So, the answer is (C) 792 miles.