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Area and Volume

SAT Math· difficulty 3/5

The surface area of a sphere is 36π36\pi. What is its radius?

  • A

    66

  • B

    33

    check_circle
  • C

    6\sqrt{6}

  • D

    99

Explanation

4πr2=36π4\pi r^2=36\pi, so r2=9r^2=9 and r=3r=3.

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