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A cookie shop is going out of business. Prices for all items in the store were assigned in July. Each month after that, the price was \(40%\) less than the price the previous month. If the price of an item was \(d\) dollars for July, what was the price for October (of the same year)?

 Jan 30, 2021
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Each  month, the price is  (1  - .40)  =  .60   =  60%   of the previous month's prive

 

So.....we  have 3  monts to  account for....let  P  be the orginal price

 

So....the October  price  is   P(.60)^3   =  .216P      =  21.6%  of July's  price

 

 

cool cool cool

 Jan 30, 2021

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