What is the meaning of the false cognate carpeta

The most common mistake made when speaking is to use a Spanish word that looks or sounds similar to an English word but has a totally different meaning. ... A Spanish word that is similar to an English word, but has a different meaning, is known as a false cognate. Some examples of false cognates are shown below.

Translated~ maria: no andrea, i'm not bad. i'm not sad either.andrea: what? maria: i'm fine but i'm very hot.(rephrase the sentence)  you: i'm excited (or excited)andrea: excited (or excited). what? i do not understand.tener = to have    estar= to be