Find a fraction equivalent to 1/2

Acircular city park has a sidewalk directly through the middle that is 111 - feet long. if each bag of fertilizer covers 50 square feet, then determine how many bags of fertilizers the parks and recreation department needs to use to cover the circular park. ignore all the sidewalks around and through the park.

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle