Which expression can be used to determine the length of segment ZY? 4
3
3 2
2
54 -3 -2 -24
1 2 3 4 5 X
-2
-3
4
in
O 32+32
o
/8² +32
O 82-32
82 - 32

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.

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step-by-step explanation:

look at photo

30,40,50 is correct answer