# Algebra

A sphere has a radius of 4x + 1. Which polynomial in standard form best describes the total surface area of the sphere? Use the formula S = 4(pi)r2 for the surface area of a sphere.

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1. well, just plug it i:

S = 4 pi (4x+1)^2

now just expand that

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2. was the answer 64pix^2 + 32pix + 4pi

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3. Yes.

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