Tania: ¡no! ¿por qué no estudiamos mientras (almorzar / preferir)?

*fluent spanish speakers! * super easy request, can you me translate the following into spanish? don't use google translate, as it isn't accurate. it has been one week since i went to orlando. i visited my family and spent the week at disney world.

Profesor: para la clase de historia mañana, por favor la lección sobre la guerra mundial. a. leo b. lee c. lean d. lea

Achemist mixes 4 liters of one acid solution with 10 liters of a 40% solution, resulting in a 30% acid solution. what is the value of x, the acid concentration of the first solution