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Emelia R.

asked • 01/13/19

(x-2)(x+3)-(x-4)(2x+5)

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Lauren H. answered • 01/13/19

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Emelia R.

Can you help me with this problem? The surface area of a sphere is the product of 4 pie and the square of the radius. How does the surface area change when the radius is halved?
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01/13/19

Lauren H.

SA = 4Πr^2 Let r = 2, then SA = 4Π2^2 = 4Π4 = 16Π Now, let r = 1, then SA = 4Π1^2 = 4Π So the ratio is 1/4. The surface new area is 1/4 of the original SA.
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01/13/19

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