8. A raffle sold 1500 tickets at $2 a ticket. The first prize is $100 and second prize is $50. Find the expected value for someone who buys one ticket. (3 pts.)

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