Question

Grant is a member of a book club. He pays a $10 yearly membership fee and can purchase books through the club for $2.75 each. His total annual cost is a function of the number of books, b, that he purchases in a year:

C(b) = 2.75b + 10



What is the total cost if he purchases 13 books in a year?

Answer 1

Answer:

he Will give you $45.75

Answer 2

$Given \: yearly \: membership \: fee \: of \:a \\book \:club = \ 10$

$Cost \: of \:each \: book = \ 2.75$

$Number \: of \: books \: purchased = b$

$Cost \: of \: purchase \: in \: a \: year :$

$\red{ C(b) = 2.75 b + 10 }$

$Here, b = 13$

$Cost \: of \: Purchase \: of \: 13 \:books \\\red{C(13)} \\= 2.75 \times 13 + 10 \\= 35.75 + 10 \\= \ 45.75$

Therefore.,

$\red{Cost \: of \: Purchase \: of \: 13 \:books}\\\green { = \ 45.75}$

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