Answer:
Kai is correct and Leila is incorrect. The movie is actually 10,800 seconds long.
Explanation:
1 hour = 60 minutes
1 minute = 60 seconds
Therefore, 1 hour = 60 x 60 = 3600 seconds
So, the movie's length in seconds is:
3 hours x 3600 seconds/hour = 10,800 seconds
Leila says the movie is less than 10,000 seconds, which is not correct, since the movie is actually longer than 10,000 seconds.
Kai says the movie is more than 10,000 seconds, which is correct.