Let b(t) be the number of unread books remaining on Alex's bookshelf after reading consistently for t months.
b ( t ) = 75 - 5t
So, b ( 9 ) = _____ .
Options : 70 or 30 or 45 or 15
This means that _____ ,
Options :
* After 9 days
* After reading 9 books per month
* After reading 9 books
* After 9 months
the _____ .
Options :
* Number of months that have passed is 70
* Number of unread books remaining is 30
* Number of unread books remaining is 45
* Number of months that have passed is 15
The first answer is After 9 months. Since in the problem it states that "t months" in for b(t) and after plugging in a 9 that turns it into months. The second answer is Number of unread books remaining is 30. Since when plugging in 9 for t the equation changes and the new equation changes to 75-5(9) = 75-45 = 30. I hoped I helped! Goodluck!
