El dominio de una función es el conjunto de valores {1, 2, 3, 4} y el contra-dominio es el conjunto {1, 4, 9, 16}. ¿Cuál es la función que relaciona estos dos conjuntos? * 2 puntos

f(x) = x +3

f(x) = 3x

f(x) = x2

f(x) = 2x​

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