Transversal t cuts parallel lines r and s. which angles must be congruent to < 2?

There will be 7 people at a party.if each person will eat 5/8 of a pound of chicken, how many pounds of chicken are needed?

Really need on these. i have no idea what to do

"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?