Trong nền kinh tế đóng, có các hàm sau: C = 70 + 0,8Yd ; I = 400 ; T = 10 + 0,2Y ; G = 294 ; Yp = 2600
Nền kinh tế đang trong tình trạng nào?

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