Every month, the bank withdraws $15
from betsy’s checking account as a
service fee. betsy has budgeted $75 for
the next few service fees. for how many
months will the service fee be covered?

5 months

Step-by-step explanation:

Given :The bank withdraws $15  from Betsy’s checking account as a  service fee every month.

To Find :  Betsy has budgeted $75 for  the next few service fees. For how many  months will the service fee be covered?

Solution :

Since we are given that $15 is service fees for 1 month

So. $1 is service fee for month =

So, $75 is service fee for months =

                                                       =

Hence$75 service charge will be covered for 5 months .

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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