Answer is A
Just make sure you do know how to do them :)
Answer:
The length between the two points is RT = 1.3 units
Step-by-step explanation:
The coordinates of the point R and T are R(2,1.2) and T(2,2.5).
Now, by DISTANCE FORMULA:
The distance between two coordinates P and Q with coordinate P(a,b) and Q(c,d) is given as:

So, here the distance RT = 
or, RT = 1.3 units
Hence, the length between the two points is RT = 1.3 units
X is greater than or equal to negative 1 and you would right 1 comma infinity
It can go 6.8 times
Good luck! :D