Recommendations Math Skill plans You've won a new prize! Go Sixth grade L.8 Divide fractions and mixed numbers: word problems WAH Tutoria Mackenzie performed a chemistry experiment in which she divided 1/2 of a box of baking soda evenly among 4 bottles. She then added vinegar and water to each bottle to make them bubble up like volcanoes. How much baking soda did she put in each bottle? Write your answer as a fraction or as a whole or mixed number. ​

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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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