Answer:
Let's find out!
Today's my B'day!
So, to calculate this, we need a equation.
(Let x= # of people in 1980)
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See? Easy... wait? It's not the solution?
Oh! Made a Mistake!
Why you always check!
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There you go!
Even Experts can make mistakes!
Hope this helps!
P.S. Stay Safe!
FYI option D