May I please receive help?

Step-by-step explanation:

The circumference is given by ...

  C = πd

  C = (3.14)(4 yd) = 12.56 yd

The area is given in terms of diameter by ...

  A = (π/4)d²

  A = (3.14/4)(4 yd)² = 12.56 yd²

idk this answer sorry cant on this one.

step-by-step explanation:

guess at question:

a vertical line intersects the graph of g(x,y) = 0 at two points. what conclusion follows about the function f(x) implicitly defined by g(x,f(x)) = 0?

the domain of f(x) cannot include the x coordinate of any such vertical line.

informally, f(x) is not a function, and

g(x,y)=0 cannot be solved for y uniquely.

the relation r = {(x,y) such that g(x,y) = 0} is a function if

for all (a,b) ∊ r and (c,d) ∊ r, a=c implies b=d.

step-by-step explanation: