Please help! Will give points!!

-Which Function is Exponential?

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

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?

In the diagram below? p is circumscribed about quadrilateral abcd. what is the value of x