Final answer:
Sienna's average speed is 4 miles per hour. To find the time to travel 352 miles at this rate, divide the distance by the speed, resulting in 88 hours of travel time.
Step-by-step explanation:
The question asks us to calculate how long it would take for Sienna to travel 352 miles at a constant rate, given that she drove 20 miles in five hours. First, we determine her average speed by dividing the distance traveled by the time taken. In this case, Sienna's average speed is 4 miles per hour (20 miles ÷ 5 hours = 4 miles/hour).
Next, to find out how long it would take to travel 352 miles at this rate, we divide the total distance by the average speed: 352 miles ÷ 4 miles/hour = 88 hours. Therefore, it would take Sienna 88 hours to travel 352 miles if she continued at the same rate.