Which answer choice correctly identifies the extraneous information in the word problem below? when resting, the average adult human heart beats about 75 beats per minute. an infant's heart beats about 130 to 150 beats per minute. how many times does the average adult human heart beat in one hour? a. there is 60 minutes in one hour. b.an infant's heart beats about 130 to 150 beats per minute. c.the average adult human heart beats about 75 beats per minute. d.both a and b

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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: