 <translate> First find how many zombies there were one day ago: 480 zombies / 2 = 240 zombies. Then find how many zombies there were two days ago: 240 zombies / 2 = 120 zombies. Then find the number of zombies there were three days ago: 120 zombies / 2 = 60 zombies. Then find the number of zombies there were four days ago: 60 zombies / 2 = 30 zombies, which is less than 50, so there were less than 50 zombies 4 days ago. The final answer: 4. <yor> Àkọ́kọ́, ẹ wo iye àwọn Zombie tó wà ní ọjọ́ kan sẹ́yìn: 480 Zombie / 2 = 240 Zombie. Wá wá rí iye àwọn Zombie tó wà ní ọjọ́ méjì sẹ́yìn: 240 zombie / 2 = 120 zombie. Nígbà náà, wá iye àwọn Zombie tó wà ní ọjọ́ mẹ́ta sẹ́yìn: 120 Zombie / 2 = 60 Zombie. Ki o si wa awọn nọmba ti zombies nibẹ wà mẹrin ọjọ seyin: 60 zombies / 2 = 30 zombies, eyi ti o jẹ kere ju 50, ki nibẹ wà kere ju 50 zombies 4 ọjọ seyin. Ìdáhùn tó gbẹ̀yìn ni pé: 4. 