Are you sure the question is written correctly? Sounds like the expectations would just be the same (24.0) and the variance is the square of the standard deviation (so it would be 0.09).
Answer: the distance is decreasing
Step-by-step explanation:
11.4 because do 57 divided by 5 equals 11.4 to run each mile
2(6x+20) +2(8x-16)=180
12x+16x+40-32=180
28x+8=180
X=180-8/28=6
I think so my calculation may be wrong )