hello, there was a drawing competition interschool, and i participated for it but its judged on likes but i wanted to know if its legal to ask for likes in..

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