Which of the following properties could be used to rewrite the expression ( 2/3 x 1/5) x 5/2 as 2/3 x (5/2 x 1/5)? O The associative property followed by the commutative property
O The commutative property followed by the associative property
O The commutative property used twice
O The associative property used once

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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804.75

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