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jedidiah

  • 3 years ago

An official volleyball measures 27 inches in circumference. find surface area.

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  1. jedidiah
    • 3 years ago
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    that's for the circumference.

  2. campbell_st
    • 3 years ago
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    so you need to find the radius so then the circumference formula is \[C = 2\pi r\] in your question you have \[27 = 2 \pi r\] make r the subject... when you have the value of r substitute it into the formula for surface area of a sphere \[SA = 4\pi r^2\]

  3. heathernelly
    • 3 years ago
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    4pir^2 4*3.14(27/2)^2 12.56(13.5)^2 12.56*182.25 2,289.06

  4. jedidiah
    • 3 years ago
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    thanks :)

  5. campbell_st
    • 3 years ago
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    I think your value for the radius is incorrect @heathernelly

  6. jedidiah
    • 3 years ago
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    a bathroom floor tile measures 6 in on a side. if the whole floor contains 100 tiles, what is the area of the bathroom floor in square ft. Note: 1 ft = 12in

  7. campbell_st
    • 3 years ago
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    well go back to the circumference formula and make r the subject... correctly...

  8. jedidiah
    • 3 years ago
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    is it? radius = 4.30?

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