Yall please help im begging you! I need to pass para:Katrina wants to find out the favorite day of the week of students at her school Katrina school has 75 six graders to 57th graders and 108th graders Katrina selects her samples by mixing the student's name in a box and choosing approximately every fourth student for each grade are sample results in 18th sixth graders,12th seventh graders, and 24 for eighth graders.​

90

step-by-step explanation:

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour

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: