Use an area model and Distributive property to solve each problem.

Imagine a new pasture with grass growing on it. every day after the seeds have germinated, the number of blades of grass in the pasture triples. after 18 days, the entire pasture is completely covered in grass. how many days did it take for the pasture to be one-third covered in grass?

How can you tell when x and y are not directly proportional?

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog