Question

select the correct answer from each drop-down menu.
let b(t) be the number of unread books remaining on alex’s bookshelf after reading consistently for t months.
so, b(9) = ▼ . this means that ▼ , the b(t) = 75 - 5t ▼ .

Explanation:

Step1: Substitute \( t = 9 \) into the function

Given \( b(t)=75 - 5t \), substitute \( t = 9 \).

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Step2: Calculate the value

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

$$ b(9)=30 $$

The function \( b(t) \) represents the number of unread books after \( t \) months. When \( t = 9 \) (after 9 months of reading), \( b(9) = 30 \) means the number of unread books remaining on Alex's bookshelf.

Answer:

\( b(9)=30 \). This means that after 9 months of reading, the number of unread books remaining on Alex's bookshelf is 30.