6x+19.98=200
200-19.98=6x
X= 200-19.98/6
= solve for it.
Answer:

Step-by-step explanation:
The formula to calculate the surface area of a sphere is the following:

Where A is the area of the sphere and r is the radius of the sphere.
In this case we know that the diameter d of the sphere is:

The diameter is:
.
Thus

Then the surface area of the sphere is:
