Which number is the smallest? a) 1.28 x 10-4 b) 2.85 x 10-6 c) 3.24 x 10-5 d) 5.48 x 10-8

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