Answer:
A. The area is 
B. She needs to cover 1661.9 square feet of tiles for the base of the swimming pool
Step-by-step explanation:
Question A:
Let us assume that the leash is pegged to the ground using a stake. as a result, the dog can move around the stake. The path that the motion of the dog would trace is a circle, and the radius of the circle will be the length of the leash.
Since we know this, we can easily find the area of the circle using 
Area of the circle = 
Question B
Dulce wants to cover the whole surface area of the floor of the circular swimming pool with tiles.
We already know that the swimming pool is circular, hence, the surface area of the base of the swimming pool will be the same as the area of a circle, with the same radius.
The area of the circle can be calculated using 
Area of circle = 
I think the correct answer from the choices listed above is option B. A parabola is a set of points in a plane that are equidistant from <span>a fixed line called the directrix and a fixed point called the focus. The distance is equal all through out from the directrix to the focus.</span>
Step-by-step explanation:
18: 4
19: 1
20: 0
21: -22
22: 38
23: -20
X+3 is the correct answer to this problem