Help I’m taking a quiz

A20? -foot ladder is placed against a vertical wall of a? building, with the bottom of the ladder standing on level ground 19 feet from the base of the building. how high up the wall does the ladder? reach?

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

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