Answer:
It is the first one and for number 2 is 160 people total
2x=80
4x=160
The given triangle is a <em><u>Right angled triangle</u></em>,
So, by applying <em><u>Pythagoras theorem</u></em><em><u> </u></em><em><u>:</u></em>

=》

=》

=》

=》

hence, value of c = 15 mi
A is the answer i believe
<u>Answer:</u>
3 and 60
<u>Step-by-step explanation:</u>
For the given proportions,
, 3 and 60 are the extremes while 12 and 15 are the means.
To understand this, we can take a look at an example.
Suppose two ratios a:b and c:d are in proportion.Then it can be expressed as
:

Here, a and d are the extreme ends and b and c are the means.