Micaela and three of her friends volunteered to collect children's books for the city's homeless shelters. There are 4 homeless shelters in the area, and each shelter received 18 books. How many books did Micaela and her three friends collect altogether? (1 point)
The total number of books collected by Micaela and her three friends is:
4 shelters x 18 books = 72 books
Therefore, Micaela and her three friends collected 72 books altogether.