<span> it's 2x3.14 times 6 times 18
</span><span>2π(6)(18)</span>
Answer:

Step-by-step explanation:
The formula to find the area of a circle is

We know that

Therefore the area is

Visibly, the functions g(x) and f(x) have restricted domains, while p(x) seems to go on infinitely. The answer is "Only p(x)."