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10 September, 18:49

I don't understand this question. Could anyone excplain to me what it wants me to do and what the answer is?

What is the diameter of a sphere that has a surface area of 1041 square inches?

A) 9.1

B) 22.5

C) 40.3

D) 18.2

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Answers (2)
  1. 10 September, 20:55
    0
    1st you need equation for the surface area of a sphere which is:

    A=4*π*r^2

    Where r=radius

    r = diameter/2 or d/2

    So

    area of a sphere = 4*π * (d/2) ^2

    Plug in the area given

    1041 = 4*π * (d/2) ^2

    Solve for d

    1041 / (4 * π) = 82.84

    82.84 = (d/2) ^2

    Sqrt (82.84) = d/2

    9.10=d/2

    9.10*2 = d

    18.2=d

    So the answer is 18.2 in
  2. 10 September, 21:55
    0
    The answer is 18.2

    I got the answer by solving it
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