Answer:
manda una foto pls es que no me deja ver lo que has puesto
Step-by-step explanation:
Answer: 30 miles
I am right.
20% of 60 is 12
60/300 = 20%
The friend is incorrect because that is 20% of 300 not 60
Answer:
There are many. Two examples are

Step-by-step explanation:
There are many examples. The simplest is
1 -

It is trivial that

2 -

That function is injective as well.

An example of a function that is NOT injective is

Notice that
