The only one that I can do without google is 47. Sorry that I can't answer the others. The answer to 47 is this: you know that the western side of the hill has the steepest slope because the ovals showing altitude are way closer together. The closer the circles/ovals are, the steeper the slope is.
Sorry if this doesn't help much, but I answered what I could without cheating.
Foxeslair
I need a little more context but I believe you are correct
Answer:
Por tanto, podemos concluir que en medio kilogramo hay un total de 500 gramos
Answer:
Copper
Explanation:
copper is used in the wiring of the phone