Answer:
8.08 %
Step-by-step explanation:
Let us denote :
score X follows a normal distribution with mean
and standard deviation 
Step 2
The probability that someone scored 21.9 or less is :





Answer : 
Answer:4/6
Step-by-step explanation:because we multiply the fraccion by 2
Answer:
y = 1/4 = 0.250.
Step-by-step explanation:
Answer:
99
Step-by-step explanation:
Triangles GJH and IJH are congruent, so GJ=IJ=99.