A population's emigration (leaving population) in one month totaled 3 individuals. During the same period, immigration (coming into the population) was 17 individuals. The number of births was 12, and deaths was 26 due to a parasite infection. What was the net effect on the population size?

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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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step-by-step explanation:

answer: y = -2.5x - 15

              (-6,0)

step-by-step explanation:

the answer is 8/21

hope this