What is the question? If it is how long is the total hike, then 17+2=19 (that’s half way).
19x2 =38. 38k is the total round trip of the hike.
Answer:
58.6
Step-by-step explanation:
Use the formula 
solving for x (b)
=
≈58.58327
and 58.58327 rounds to 58.6
Answer:
(D)

Step-by-step explanation:
Given T(-2,4,7) and M(-3,5,2)
where m and t are position vectors. 
Given v=<x,y,z>, then the magnitude of v is:

For this case the first thing you should know is that if the coefficient of determination (R) is equal to 1, the graph is totally perfect.
Therefore, the closer the value of R is to one, the mathematical model will be the most appropriate.
We have then:
The coefficient of determination for the linear model was 0.95.
Therefore, the mathematical model must be linear.
Answer:
A model that should be used to represent the data set is:
A linear