Just want to check to make sure this is right. I got 81 as the average so D seemed right.
1 answer:
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The formula of the surface area of the rectangular prism is equal:
where:
l - length
w - width
h - height
We have:
l = 5m
w = 8m
h = 9m
Substitute:
where:
l - length
w - width
h - height
We have:
l = 5m
w = 8m
h = 9m
Substitute: