1. Explain the most common types of sampling methods. If you needed to survey a city about a new road project, which sampling method would you choose and explain the sample method. ​

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