Among various populations of plants or animals diseases spread exponentially use the function y=325(1-e^-0.15t) tomorrow the spread of the potentially lethal Newcastle disease among a flock of 325 turkeys on a turkey farm with the equal to the number of days since the first case of the disease how many birds will be infected with Newcastle disease after seven days

It's 211

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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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