James is a welder who earns $12.50 per hour. He works 8 hours per day, Monday through Friday. How much does James earn in one week?

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