A bacterium animal splits into two identical cells every 30 minutes. If 15 bacterium animals are present at the start, predict the number of bacterium animals in five hours. Show all work.

Luigi is the first person to finish a 5k race and is standing 13 feet beyond the finish line. another runner, mario, is still running the race and has approximately 24 feet before he reaches the finish line. what is the distance between mario and luigi? explain through words, numbers or pictures how you found the answer.