What is 43x567 and what’s another ways to solve

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.

If g^-1(x) is the inverse of g (x) which statement must be true

If f(x)=x+7 and g(x)=1/x what is (fog)(x)