If crystal scored 81, 90, and 95 on her science exams, what score would she need on her next exam in order for her mean and her median scores to be the same

Will mark brainliest question in the pic.

Eileen purchased 3.4 pounds of apples at the total cost of $19.72. if she purchases 6.2 pounds of apples at this store, how much would it cost?

An architect is designing a water fountain for a park she uses the given function to model the water jet flowing from the fountain nozzles where h(x) gives the height of the water jugs in feet x feet from the starting point h(x)=-1/20x+x+15