Decide whether the sentence is correct or incorrect as written. nos queda dos horas

This is incorrect because of the word queda, which is a conjugation of the verb quedar. Since we are using the indirect object pronoun for the first person plural (nos), we need to use the conjugation quedan in this case. Hence the correct sentence is as follows:

Nos quedan dos horas

lack of land area is one of the things not mentioned that has contributed to the poor transportation and communication systems in nicaragua.