Question

A sphere has a radius of 2x+5 Which polynomial in standard form best describes the total surface area of the sphere? Use the formula S= 4 pi r^2 for the surface area of a sphere

Answer 1

4pi(2x+5)^2 (2x+5)(2x+5)

Answer 2

is this the right answer?

Answer 3

@KenLJW

Answer 4

The volume of a sphere is V = (4/3) pi r^3
The surface area of a sphere is A = 4 pi r^2
In your case
A = 4 pi (2 x + 5) ^ 2
A = 4 pi (4 x^ 2 + 20 x +25)
A = 16 pi (x^ 2 + 5 x + 25/4)
is this what you mean by standard form?