If the sum of two consecutive even number is 22 , find the number

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?

On a piece of paper graph f(x)=5•(0.4)^x

An equation where variables are used to represent known values—function notation true or false