Find the missing angle.

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?

The step function g(x) is defined as shown.what is the range of g(x)? ***answer choices in picture.

Is this a polynomial function? i need to know asap