The track team ran a 100-meter sprint. Their times are shown in the table. 9.8 10.4 12.19.4 10.1 10.0 11.1
10.910.9 9.3 12.0 9.6 9.9 12.5
Rounded to the nearest tenth of a second, what is the mean 100-meter sprint time of the team?

step-by-step explanation:

given that ab is divided into equal parts as

ac, cd, de, ef, fg, gh, hi, ib.

from this we find that f is the midpoint of ab.

so using mid point formula we find

f = (3,7)

similarly considering fb, we get

h = mid point of fb = ((6,6) and g, mid point of fh is

g = (9/2, 13/2)

i is mid point of hb

so i =(15/2,11/2)