Julie spends $ 5.62 at the store. micah spends 5 times as much as julie. jeremy spends $6.72 more than micah . how much does each person spend?

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