At the aquarium, each tank contains five fish. freddy wants to calculate the total number of fish at the aquarium. what variable is needed to calculate the total?

options

v, the number of daily visitors to the aquarium

t, the number of tanks at the aquarium

n, the number of new fish in the aquarium

f, the number of fish in each tank

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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step-by-step explanation: