MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Please see below for the question details. I got 34.32 for the interest, but I also got 19.68 and 32 when I reworked the problem; Please help!!!!

Because of the relatively high interest rates, most consumers attempt to pay off their credit card bills promptly. However, this is not always possible. An analysis of the amount of interest paid monthly by a bank's Visa cardholders reveals that the amount is normally distributed with a mean of 27 dollars and a standard deviation of 8 dollars.Please use z-scores with at least 3 decimal places.

D. What interest payment is exceeded by only 18% of the bank's Visa cardholders?

Interest Payment =

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