To find Kenneth's average speed, we can use the formula:
\[ \text{Average Speed} = \frac{\text{Total Distance}}{\text{Total Time}} \]
In Kenneth's case, the total distance is 26.2 miles and the total time is 5.5 hours.
Now we can calculate the average speed:
\[ \text{Average Speed} = \frac{26.2 \text{ miles}}{5.5 \text{ hours}} \approx 4.763636364 \text{ mph} \]
Rounding to the nearest tenth:
\[ \text{Average Speed} \approx 4.8 \text{ mph} \]
So, Kenneth’s average speed was 4.8 mph.