Erin covered a box with contact paper. The dimensions of the box are shown in the figure below: A rectangular prism is shown. The length of the rectangular prism is labeled as 11 inches, the height is labeled as 9 inches and the width is labeled as 8 inches. The contact paper costs 8¢ per square inch. She will only pay for the contact paper used to cover the box, even if there is waste or extra. How much money did Erin spend on the contact paper?

Question

Mathematics

Josiah Hebert

6 November, 19:25

Erin covered a box with contact paper. The dimensions of the box are shown in the figure below: A rectangular prism is shown. The length of the rectangular prism is labeled as 11 inches, the height is labeled as 9 inches and the width is labeled as 8 inches. The contact paper costs 8¢ per square inch. She will only pay for the contact paper used to cover the box, even if there is waste or extra. How much money did Erin spend on the contact paper?

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Answers (1)

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Kaitlyn Woodward · Answer 1

You can find the surface area of the rectangular prism, and the multiply that by 8.

The surface area of a rectangular prism can be found using the equation

A = 2 (wl+hl+wh)

where

w = width

l=length

and h = height

When plugging in the correct values, you get a surface area of 518.

518 * 8 = 4144

You must now divide by 100 because it was 8 cents, not 8 dollars, so dividing by 100 will convert it to dollars.

Erin spent $41.44 on contact paper