Greg created a plot of the number of songs he downloaded from an Internet music site and the total cost of those songs. He let x represent the number of songs downloaded and y represent the total cost in dollars. He then plotted the points (6, 7.5), (8, 10), (10, 12.5), and (12, 15) represent his four most recent purchases

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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the answer should be a. snail

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