Answer:
The general formula for the total surface area of a regular pyramid is T. S. A. =12pl+B where p represents the perimeter of the base, l the slant height and B the area of the base.
A= -81 + square root of 113
a<span>≈</span> -70.36985418
6.5 times 4 and 13 times 2
First one is : D (6)
Second one is : B (1/3)
Hope this helps!
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