1. Es
2. Estamos
3. Son
4. Está
5. Soy
6. Eres
7. Estoy
8. Somos
9. Están
10. Estás
Answer:
0.4kg/cm².
Explanation:
60kg / 150 cm². = 0.4 kg/cm².
They end that way because they are in "infinitivo", infinitive. It is the equivalent of saying "to x"
Eg.
Aprender - to learn
Vivir - to live
Encontrar - to find
The conjugation (-er, -ir or -ar) depends on each word, it is a matter of memorising them, I'm afraid.
Hope this helped :)