Why are 1 4 9 16 and 25 called perfect squares

In the film, zeke the zombie slayer versus the zombies from space, zeke slayed 140 zombies. in the sequel, zeke the zombie slayer versus the zombies from space, part 2, he slayed 5% more zombies. how many zombies were slain by zeke in the sequel?

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

Which of the following is true for the relation f(x)=2x^2+1