634 people are waiting to come through the security line at the concert. The people can come through in groups of 12.
How many groups will go through the line so that everyone
makes it through?
If it takes 3 minutes per group to go through security, how
long will it take for everyone to go through?

360/29

step-by-step explanation:

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:

the answer is:

mean: 6

mad: 2.14