Question

Let b(t) be the number of unread books remaining on Alex's bookshelf after reading consistently for t months. b(t)=75 - 5t

Answer 1

Functions are expressed in terms of variables. The number of unread books remaining after 9 months is 30

Functions and values

Functions are expressed in terms of variables. Given the function that represents the number of unread books remaining on Alex's bookshelf after reading consistently for t months as;

b(t)=75 - 5t

In order to determine b(9), we will substitute t = 9 into the function to have:

b(t)=75 - 5t

b(9)=75 - 5(9)

b(9) = 75 - 45

b(9) = 30

Hence the number of unread books remaining after 9 months is 30

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