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Because of the relatively high interest rates most consumers attempt to pay off their credit...

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Calculus

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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 29 dollars and a standard deviation of 9 dollars A What proportion of the bank s Visa cardholders pay more than 31 dollars in interest Proportion B What proportion of the bank s Visa cardholders pay more than 38 dollars in interest Proportion C What proportion of the bank s Visa cardholders pay less than 17 dollars in interest Proportion D What interest payment is exceeded by only 22 of the bank s Visa cardholders Interest Payment

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