Please Help 10 points

Could answer every question with steps

Pat listed all the numbers that have 15 as a multiple write the numbers in pats list

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