Question

select the correct answer from each drop - down menu. let b(t) be the number of unread books remaining on alexs bookshelf after reading consistently for t months. b(t)=75 - 5t. so, b(9)=30. this means that < after 9 days after 9 months after reading 9 books per month after reading 9 books >.

Explanation:

Step1: Identify the function and value of t

We have the function $b(t)=75 - 5t$, and we need to find $b(9)$. Here, $t = 9$.

Step2: Substitute t into the function

Substitute $t = 9$ into $b(t)=75 - 5t$. So $b(9)=75-5\times9$.

Step3: Perform the arithmetic operation

First, calculate $5\times9 = 45$. Then $b(9)=75 - 45=30$. This means that after reading 5 books per month for 9 months, the number of un - read books is 30.

Answer:

After 9 months, the number of unread books remaining on Alex's bookshelf is 30.