Let
x---------> the thickness of the frame in feet
At-------> Area of the mirror and the frame in square feet
we know that
------> equation 
--------> equation 
equate equation
and equation 

therefore
the answer is the option

The answer to this question is b.102ft2
Answer:
and 
Step-by-step explanation:
We know that
where
is an angle of a triangle.
In the triangle given above ,
. So,
1) 


2) 


The answer is D.
Hope it helps!