Aline segment connecting two antipodal (diametrically opposite) points on a sphere will pass through the center of the sphere.
points a(2,-7,-4) and b(6,1,2) are a pair of antipodal points on a sphere. find the exact surface area and exact volume of this sphere.

Step-by-step explanation:

Diameter, Area, and Volume of a Sphere

Given the radius of a sphere (r), we can compute the area of the sphere as

The volume is

If we know the diameter of the sphere (d), the radius is half of d

Two antipodal (or diametrically opposite) points can be used to determine both the center and the radius of the spere. We are only interested in computing the radius, we need first to calculate the diameter which is the distance between the antipodal points A(2,-7,-4) and B(6,1,2). The distance between these two points in R^3 is

That is the diameter, now the radius is

Let's compute the area

Finally, the volume is

x+y = 29, 5x + 2y = 100

step-by-step explanation:

i'm guessing it was a multiple first option was the correct answer

so far i think you have the right thing going for you just remember soh cah toh

step-by-step explanation:

sine over hypotenuse

cosine   equals adjacent

tangent over hypotenuse