Michaela is competing in a race in which she both runs and ride a bicycle. She runs 5 kilometers in 0.5 hour and ride her bicycle 20 km in 0.8 hour.

To find Michaela's average speed for the entire race, we need to calculate her total distance and total time.

Her total distance is 5 km + 20 km = 25 km.
Her total time is 0.5 hours + 0.8 hours = 1.3 hours.

Now, we can calculate her average speed by dividing her total distance by her total time:

Average Speed = Total Distance / Total Time
= 25 km / 1.3 hours
≈ 19.23 km/h

Therefore, Michaela's average speed for the entire race is approximately 19.23 km/h.