184/8=23
8=alice
9=bernice
18=cheryl
8:9:18=184:207:414
This is false, it is not negative because the answer is 0.
X=h/4+5/4 is the correct answer
P(X<=x) = 1 + 5.486 = 6.486
The z-score of the information given is,
z = (x - µ )/ σ
Where,
µ = mean
σ = standard deviation
From the information given,
x = 3.71
µ = 86
σ = √225 = 15
hence,
z = (3.71 - 86)/15 = -5.486
thus,
P(X<=x) = 1 + 5.486 = 6.486
hence , P(X<=x) = 1 + 5.486 = 6.486
Learn more about variance here brainly.com/question/9304306
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it's x ≤ 3 :))) I found it out after realizing what you were asking