Oof please help me with geometry

as it a cyclic quadrilateral

its opposite sides sum be 180

z/2+z/4+30=180

2z+z/4=150

3z/4=150...z=200

angles...

b=z/2=200/2=100

d=80

e=200-59=141

c=180-141=39

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

click to let others know, how is it

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