Find a polynomial function with the zeros -1 (multiplicity 2) and 1 (multiplicity 2), whose graph passes through the point (-2,45)

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