Apitcher contains 3 1/2 pints of lemonade. susan pours 5/8 of a pint into a glass, and mateo pours 1/2 pint into a glass. how much lemonade is left in the pitcher?

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