Which region represents the solution to the given system of inequalities?

Last one and the bottom answer choice is y=(x-4)^2+1 you guys!

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of

Arestaurant added a new outdoor section that was 8 feet wide and 6 feet long. what is the area of their new outdoor section