Liliana needs to buy beads for a necklace. The beads are sold by mass. She sketches a design to determine what beads are needed, and then
writes down their sizes. The sizes are shown below.

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