Izzy gets a loan of $2,800 with an apr of 3.5% . she will repay the loan in monthly payments for 9 months. to find the total amount of interest she will pay, izzy uses an online calculator. what are the correct numbers she should enter?

First, change percent into decimal value
Percent means per hundred
APR = 3.5%
APR = 3.5/100
APR = 0.035
The APR is 0.035 of the total loan

Second, we need to find interest rate for 9 months
interest rate = 9/12 × 0.035
interest rate = 3/4 × 0.035
interest rate = 0.75 × 0.035

Third, determine what to put into calculator
She can put it like this
interest = interest rate × total loan
interest = 0.75 × 0.035 × 2,800

Or she can put it like this
interest = 0.02625 × 2,800

A] from the box plots representing the battery brands we shall have the median as follows:
brand x- median is 13
brand y- median is 16

b]  what is range for each data set?
range is given by:
maximum-minimum 
brand x
maximum=16
minimum =11
range=16-11=5
brand y
maximum=18
minimum=10
thus
range=18-10=8
c] what is the interquartile range for each data set?
iqr=[3rd quartile]-[1st quartile]
brand x:
3rd quartile=14.5
1st quartile=12
iqr=14.5-12=2.5
brand y
3rd quartile=17
1st quartile=15
iqr=17-15=2
d] i'd recommend brand y because the average life is greater than brand x. that means it lasts more as compared to the latter