Final answer:
Alexander has missed 20.8 minutes of soccer practice time.
Step-by-step explanation:
To find out how much time Alexander has missed in total, we need to multiply the number of times he was late (4 times) by the amount of time he missed each time (5.2 minutes).
Therefore, the total practice time Alexander has missed is 4 times 5.2 minutes, which is 20.8 minutes.
So, Alexander has missed 20.8 minutes of soccer practice time.