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Helena is an engineer that designs packaging for new products. She designed a box in the shape of a rectangular prism with dimensions of 10 inches by 7 inches by 4 inches. What is the surface area of the box?

a.138 square inches
b.276 square inches
c.280 square inches
d.441 square inches

Sagot :

B is the answer
10x7= 70 (Base 1)
10x7= 70 (Base 2)
10x4= 40 (Front)
10x4= 40 (Back)
  7x4= 28 (Side 1)
  7x4= 28 (Side 2)
---------------------------------
   SA= 276
Remember to think of a rectangular prism as a box, then label the base, the width, and the height :)

Answer: I think it B. 276 square inches

Step-by-step explanation:

There you go your welcome have great day everyone

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