Answer:
Shelina is raising money by participating in a readathon and receives $15 for every book she reads. Her goal is to collect at least $180. We can use simple division to calculate the least number of books she needs to read to achieve her goal.
To find out, we can divide the goal amount by the amount received per book:
$180 ÷ $15/book = 12 books
Therefore, Shelina needs to read at least 12 books during the readathon to collect at least $180.