What is the surface area of a sphere with radius of 3.5? A. 12.25p B. 14p C. 24.5p D. 49p

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23-11-2016
Mathematics

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What is the surface area of a sphere with radius of 3.5? A. 12.25p B. 14p C. 24.5p D. 49p

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Greenleafable Greenleafable · Answer 1 · 2016-12-02T16:47:08+01:00

Greenleafable Greenleafable

02-12-2016

S=4πr2 - this is the equation for the surface area of a sphere. We know that the radius (r) is 3.5 so here's how to solve this:

S = 4π r2
S = 4π (3.5)2
S = 4π 12.25
S = 49π

The surface area of a sphere with radius of 3.5 is 49π.

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