Find the interest paid on a deposit of $225 at a rate of 1.5% over two years

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?

Which is a reasonable estimate of the amount of water in a small, inflatable pool used by children?

Is this a polynomial function? i need to know asap