Shawna's car averages 28 miles per gallon of gasoline. Shawna wants to determine how far she can drive based on the gallons of gas in her car. Write an equation to represent the situation. What is the rate of change for Shawna's situation and what does the rate of change represent?

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b) 62.47% of the students are between 14 and 18 years old.

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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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b

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