Can you guys my teacher makes no sense

Ineed asap.i cant understand this question i need someone to me right away

"princess tower" in dubai is considered the world's tallest residential building, towering to 1 0 1 101 floors! t ( n ) t(n) models the number of tenants living on floor n n of the tower. what does the statement t ( 2 0 ) = t ( c ) t(20)=t(c) mean?

Graph each quadratic function and identify its key characteristics. f(x) = x^2 - 2x - 3