Answer:
substitute that (6) in X so f(6) = 2(6) which is = 12
I believe it would be $132.50.
Hope this helps!!!
Given the ellipsoid

For the radius in the x-dirextion, y = z = 0, and we have

For the radius in the y-dirextion, x = z = 0, and we have

For the radius in the z-dirextion, x = y = 0, and we have

Thus, the radius of the ellipsoid is given by