To find out how many zombies there would be after seven days, we need to calculate the number of zombies at the end of each day and sum them up.
Let's start with the initial number of zombies: 5.
On the first day, the number of zombies tripled, so there would be 5 * 3 = <<5*3=15>>15 zombies.
On the second day, the number of zombies tripled again, so there would be 15 * 3 = <<15*3=45>>45 zombies.
On the third day, the number of zombies tripled again, so there would be 45 * 3 = <<45*3=135>>135 zombies.
On the fourth day, the number of zombies tripled again, so there would be 135 * 3 = <<135*3=405>>405 zombies.
On the fifth day, the number of zombies tripled again, so there would be 405 * 3 = <<405*3=1215>>1215 zombies.
On the sixth day, the number of zombies tripled again, so there would be 1215 * 3 = <<1215*3=3645>>3645 zombies.
On the seventh day, the number of zombies tripled again, so there would be 3645 * 3 = <<3645*3=10935>>10935 zombies.
Therefore, after seven days, there would be 10,935 zombies.
when the apocalypse began, there were 5 zombies. each day that number tripled. how many zombies would there be after seven days?
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