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Arlecino [84]
2 years ago
15

I need help plz plz plz plz

Mathematics
1 answer:
dem82 [27]2 years ago
4 0

9514 1404 393

Answer:

   (a)  34 ft²

Step-by-step explanation:

The "top" and "back" together have a height of 2 ft + 1 1/2 ft = 3 1/2 ft. The bottom and front will have the same height, so the central vertical rectangle in the net will have a height of 2×(3 1/2 ft) = 7 ft. It is shown as having a width of 4 ft, so its area is ...

  A = WH = (4 ft)(7 ft) = 28 ft²

__

The two areas labeled "left" and "right" are shown as having a height of 1 1/2 ft. Their width is the same as the width of the bottom (or top), so is 2 ft. The total area of the left and right sides is then ...

  left + right = 2WH = 2(2 ft)(1 1/2 ft) = 6 ft²

That makes the area of the entire net be ...

  total surface area = 28 ft² +6 ft² = 34 ft²

The surface area of the box is 34 square feet.

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