What does this sentence in spanish mean? “ ¿qué tal

Calcula la concentracion de hidronio en la lluvia ácida si el ph es 4.35

Choose a fruit or vegetable that is not the same color as the fruit or vegetable listed below. el tomate la manzana, la fresa la sandía la pera

Solve for x: log(x + 3) - log x = 2