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Which statement best describes the polynomial

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

When a valve is open 281 gallons of water go through it in one hour the number of gallons that would go through in 94 hours is