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. this means that so, b(9)= <15 70 30 45>.

Explanation:

Step1: Substitute t = 9 into the function

We have the function $b(t)=75 - 5t$. Substitute $t = 9$ into it: $b(9)=75-5\times9$.

Step2: Perform the multiplication

First, calculate $5\times9 = 45$. So $b(9)=75 - 45$.

Step3: Perform the subtraction

$75-45=30$.

Answer:

30