Does aliens exist in this world

No, not yet

Explanation:

There is no reliable evidence, and none has ever been presented, to indicate that they do.

Or to indicate that they have ever been here in the past.

So as far as we know, they're not here now, and they never were.

we're given that v₀ = 0 and a = 5.4 m/s². therefore, since v = at + v₀ for constant acceleration the equation for velocity is

after 28s,

m/s

which i would round to 150 m/s as my final answer

no

explanation:

no i dont know how to solve this you should probably try to google the answer