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19 July, 01:12

Uses formula to find the amount of wrapping paper you need to wrap a gift in the cylindrical box shown. You need to cover the top, bottom, and all the way around the box. Use 3.14 for pi.

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  1. 19 July, 05:08
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    960.84 in^2

    Step-by-step explanation:

    The formula for the surface area of a cylinder is ...

    SA = 2πr^2 + 2πrh = 2πr (r + h)

    For the given box, the surface area is ...

    SA = 2π (9 in) (9 in + 8 in) = 306π in^2

    SA = 960.84 in^2

    960.84 square inches of wrapping paper are needed.
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