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30 November, 09:12

You need to wrap a present that is in the shape of a rectangle prism. The present has a length of 5 inches, a width of 4.5 inches, and a height of 3.5 inches. Find the total surface area of the present.

111.5 in2

55.75 in2

95.75 in2

135 in2

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  1. 30 November, 11:56
    0
    The surface area is made up of six sides and the area is then just the sum of the areas of the six sides ...

    A=2xy+2xz+2yz

    A=2 (xy+xz+yz) in this case:

    A=2 (5*4.5+5*3.5+4.5*3.5)

    A=2 (22.5+17.5+15.75)

    A=2 (55.75)

    A=111.5 in^2
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