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Mathematics 8 Online
OpenStudy (anonymous):

Erin covered a box with contact paper. The dimensions of the box are shown in the figure below:

OpenStudy (anonymous):

OpenStudy (anonymous):

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? $20.72 $41.44 $48.12 $73.14

Vocaloid (vocaloid):

first find the surface area

Vocaloid (vocaloid):

surface area = 2*width*height + 2*width*length + 2*length*height

OpenStudy (anonymous):

sry im confused

OpenStudy (anonymous):

@hartnn

Vocaloid (vocaloid):

width = 8 inches length = 11 inches height = 9 inches surface area = 2*width*height + 2*width*length + 2*length*height = ?

OpenStudy (anonymous):

56

Vocaloid (vocaloid):

try again...

Vocaloid (vocaloid):

2*width*height = ?

Vocaloid (vocaloid):

* means multiply

OpenStudy (anonymous):

518

Vocaloid (vocaloid):

right, so our surface area is 518 inch^2 now multiply that by 0.08 to get our final answer...

OpenStudy (anonymous):

41.44

Vocaloid (vocaloid):

right, that's our final answer

OpenStudy (anonymous):

Thank u!!! ^_^

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