Mathematics, 16.09.2019 01:50 dimontsho4717

Someone , i'm so confused.
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 = 4π r² for the surface area of a sphere.
a. 16πr² + 80πx + 100π
b. 16πx² - 80πx - 100π
c. 16πx² + 80πx + 100π
d. 16πx² - 80πx + 100π

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Someone , i'm so confused.
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