Final answer:
The daily revenue generated by the SDSU bookstore from book rentals is $25.
Step-by-step explanation:
To find the daily revenue generated by the SDSU bookstore from book rentals, you need to determine the number of books loaned out to students and multiply it by the rental cost per book.
Given that 25% of the available books are loaned out and each book costs $1 per day to rent, you can calculate the daily revenue using the formula:
Number of books loaned out x Rental cost per book = Daily revenue
Assuming there are 100 books available, 25% of them would be 25 books. Therefore, the daily revenue generated by the SDSU bookstore is:
25 books x $1 = $25.