Historical data show that customers who download music from a popular Web service spend approximately ​$23 per​ month, with a standard deviation of ​$4. Assume the spending follows the normal probability distribution. Find the probability that a customer will spend at least ​$19 per month. How much​ (or more) do the top ​11% of customers​ spend? What is the probability that a customer will spend at least ​$19 per​ month? (Round to four decimal places as​ needed.)   How much​ (or more) do the top ​11% of customers​ spend? (Round to the nearest cent as needed)

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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Historical data show that customers who download music from a popular Web service spend approximately ​$23 per​ month, with a standard deviation of ​$4. Assume the spending follows the normal probability distribution. Find the probability that a customer will spend at least ​$19 per month. How much​ (or more) do the top ​11% of customers​ spend?

What is the probability that a customer will spend at least ​$19 per​ month?
(Round to four decimal places as​ needed.)
 
How much​ (or more) do the top ​11% of customers​ spend?
(Round to the nearest cent as needed)
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