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How do you know if the website is secure if you make a purchase

Mastercard managers are motivated to increase (1) the number of individuals who have and use a mastercard credit card, (2) the number of banks and other clents who issue mastercards to customers and/or employees, and (3) the number of locations that accept mastercard payments. discuss how mastercard could use its data warehouse to it expand each of these customer bases.

Java the manager of a football stadium wants you to write a program that calculates the total ticket sales after each game