What is that three effect cost per minute (the total cost divided by the number of minutes to talked) of talking eight hours? Of talking 20 hours?

the answer is d. (1.2, -4.7) on edgn

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i think that you should ask google for the answer to that problem because if we don't know it google does

i think the amount would be $140.62

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: