Question

Shawn is a member of a book club. He pays a $50 yearly membership fee and can purchase books through the club for $5 each. His total annual cost is a function of the number of books, b, that he purchases in a year:

C(b) = 5b + 50

What is the total cost if he purchase 17 books in a year?​

Answer 1

The annual total cost is $135 when he purchases 17 books

Explanation:

Given function is:

C(b) = 5b + 50

Here c is the output which is cost and b is the input which is number of books purchased in an year.

In order to find the total cost when he purchases 17 books, we have to put 17 in place of b and find the cost.

So,

Putting b = 17

`C(17) = 5(17) + 50\\= 85+50 = 135`

Hence,

The annual total cost is $135 when he purchases 17 books