Answer:
480 books
Step-by-step explanation:
There are 4 quarters in a dollar, so you know that 1 dollar is 4 quarters. You have 10 dollars, so you need to multiply the number of quarts in a dollar by the number of dollars you have:
4 × 10 = 40
You know that he gets a quarter for every dozen books and a dozen is 12. So you need to multiply the number of quarters by the number of books:
40 × 12 = 480
Jamie needs to cover 480 books to earn $10.
