When Zoey runs the 400 meter dash, her finishing times are normally distributed with a mean of seconds and a standard deviation of 1 second. What percentage of races will her finishing time be slower than 77 seconds, to the nearest tenth?

dc=6 square root of 3 and ac is 12 square root 3

c and d

step-by-step explanation:

square root of 3/2 = 18/c

cross multiply to get 18*2=√3*c

36/√3 * √3/√3 = c

c= 36*√3/3

c=12√3

the answer is 5/14.

hope this .

i have not got your picture clearly so see it once again

the answer to your question is b.