Mr. dupee bought a novel at a bookstore on sale for 20% off its regular price of $29.99. mr. edgar bought the same novel at a different bookstore for 10% off its regular price of $25. who received the better discount? explain answer : 3

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