If a sphere’s radius is quadrupled, what is the corresponding change in surface area? A. The surface area is quadrupled. B. The surface area is multiplied by 8. C. The surface area is multiplied by 16. D. The surface area is doubled.

Respuesta :

[tex]A=4\pi r^2[/tex]

Quadrupling the radius gives an area of

[tex]A=4\pi(4r)^2=4^2\times4\pi r^2[/tex]

which is 16 times the original area.

If a sphere’s radius is quadrupled, the corresponding change in surface area is that the surface area will be multiplied by 16 option (B) is correct.

What is a sphere?

It is defined as three-dimensional geometry when half-circle two-dimensional geometry is revolved around the diameter of the sphere that will form.

Let's suppose the radius of the sphere is r units.

The surface area of the sphere is given by:

[tex]\rm S = 4\pi r^2[/tex]

Where r is the radius of the sphere and S is the surface area.

If radius r = 4r   ( if radius is quadrupled)

Put this value in the surface area of the sphere formula, we get:

[tex]\rm S' = 4\pi (4r)^2[/tex]

[tex]\rm S' = 16\times4\pi r^2[/tex]

[tex]\rm S' = 16S[/tex]    [tex](\rm S = 4\pi r^2)[/tex]

Thus, the surface area multiplied by 16 option (B) is correct.

Learn more about the sphere here:

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