Final answer:
To find the length of the trail, we add up the distances hiked on each day, which gives us a total of 78 miles.
Step-by-step explanation:
To find the length of the trail, we need to analyze the given information step by step.
First, we know that Phoenix hiked a total of 26 miles on the first two days.
Next, we know that she averaged 12 miles per day on the second and third days. So, she hiked a total of 24 miles on those two days.
Finally, we know that she hiked a total of 28 miles on the last two days.
Adding up these distances, we have 26 miles + 24 miles + 28 miles = 78 miles.
Therefore, the trail Phoenix hiked is 78 miles long.