Answer:
Option D is correct
![\pi r^2](https://tex.z-dn.net/?f=%5Cpi%20r%5E2)
Step-by-step explanation:
Area of a circle is given by:
![A = \pi r^2](https://tex.z-dn.net/?f=A%20%3D%20%5Cpi%20r%5E2)
where,
A is the area of the circle
r is the radius of the circle
As per the statement:
The wrestling team needs to calculate the area of a round wrestling mat
Since, wrestling mat is in the shape of the circle.
Using the area of circle formula we have;
![\text{Area of a round wrestling mat} = \pi r^2](https://tex.z-dn.net/?f=%5Ctext%7BArea%20of%20a%20round%20wrestling%20mat%7D%20%3D%20%5Cpi%20r%5E2)
Therefore, the formula should they use is, ![\pi r^2](https://tex.z-dn.net/?f=%5Cpi%20r%5E2)