Asked by SkatingDJ
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)r^2 for the surface area of a sphere.
16(pi)x^2 + 16(pi)
16(pi)x^2 + 48(pi)x + 16(pi)
36(pi)x^2 + 48(pi)x + 16(pi)
36(pi)x^2 + 24(pi)x + 16(pi)
16(pi)x^2 + 16(pi)
16(pi)x^2 + 48(pi)x + 16(pi)
36(pi)x^2 + 48(pi)x + 16(pi)
36(pi)x^2 + 24(pi)x + 16(pi)
Answers
Answered by
Reiny
SA = 4πr^2
= 4π(4x+1)^2
= 4π(16x^2 + 8x + 1)
= 64πr^2 + 32πx + 4π
None of the choices match this
= 4π(4x+1)^2
= 4π(16x^2 + 8x + 1)
= 64πr^2 + 32πx + 4π
None of the choices match this
Answered by
SkatingDJ
Reiny, this is what I get too, but yes, it is none of the options:( Can you help me with one more?
Answered by
SkatingDJ
nevermind, I got it:) Thank you
Answered by
SkatingDJ
36πx2+48πx+16π :)
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