Answer:
a.15
Step-by-step explanation:
11=6+k/3
subtract 6
11-6=k/3
5=k/3
multiply by 3/1 (basically just opposite of 1/3)
15=k
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For this case we must find the surface area of a rectangular prism.
We have then:

Where,
w: width
l: long
h: height
Substituting values we have:
Answer:
There will be needed 88 in ^ 2 of giftwrap to cover the box