HELP me please please

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.

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

Solve the following inequalities and show the solution on a number line. 3/4 (2x-7) ≤ 5