<h2>
Answer:</h2>
The total length (in units) of the biking trail is:
10 units.
<h2>
Step-by-step explanation:</h2>
We know that the distance between two points A(a,b) and B(a',b') is calculated by using the distance formula:
It is given that:
The trail starts at P(−2, 2) and goes to Q(5, 2).
This means that the distance traveled in this trail is:
and
The other trail goes from Q to R(5, −5) and then to S(8, −5).
i.e.
the distance traveled is:
Hence, the total length of the biking trail is: