A lending delivery charges c cents for the first week and f cents for each day over 1 week. What is the cost for taking out a book for d days where d is greater than 7?

A lending delivery charges c cents for the first week and f cents for

1.	A lending delivery charges c cents for the first week and f cents for each day over 1 week. What is the cost for taking out a book for d days where d is greater than 7?
A.	C+fd
B.	Cd
C.	C+f(d-7)
D.	7c+f(d-7)
Answer» D. 7c+f(d-7)

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A lending delivery charges c cents for the first week and f cents for each day over 1 week. What is the cost for taking out a book for d days where d is greater than 7?

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