Sachin deposited 100000 in his bank for 2 years at simple interest rate of 6% how much interest would be on how much would be the final value of deposit​

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