Which of these sentences have formal mandates?
there is only one sentence that has a formal mandates
caben más libros en la caja.
josé, vaya a clase.
catalina, practica el piano.

The correct option is: b. (José, vaya a clase)

Explanation:

In Spanish, the 3rd person (singular and plural) of the present subjunctive is used to form the formal mandates.

In the informal mandates, the 3rd person of the singular of the present indicative is used to form the affirmative mandates and the 2nd person (you) of the present of the subjunctive to form the negative mandates.

In the example of the formal mandate:

AFFIRMATIVE: ¡Hable!

NEGATIVE: ¡No hable!

In the example of the informal mandate:  

AFFIRMATIVE: ¡Habla!  

NEGATIVE: ¡No hables!

wow im trying to figure it out

the ecuadorians are more hard working people and word from early sun raise until sunset. then you join with family for dinner and talk about their day. while in america it’s different. everyone live and have different rules and traditions habits.