The average human breathes approximately 12 times per minute. it would take approximately how many minutes to breathe one billion times

83,333,333.3 minutes

Step-by-step explanation:

The average human breaths per minute approximately = 12 times

We have to calculate the time of breathing one billion times.

So we will divide one billion by 12.

Time taken to breath one billion times =  

                                                                = 83,333,333.3 minutes

It will take 83,333,333.3 minutes to breath one billion times.

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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