Answer: OPTION C
Step-by-step explanation:
There is a general formula for calculate the surface area of a regular pyramid. This is:
[tex]SA=\frac{1}{2}p*l+B[/tex]
Where p is the perimeter of the base, l is the slant height and B is the area of the base.
The base is a square, therefore B is:
[tex]B=(5.3yd)^{2}=28.09yd^{2}[/tex]
The perimeter is:
[tex]P=4(5.3yd)=21.2yd[/tex]
Then, the surface area is:
[tex]SA=\frac{1}{2}(21.2yd)(11.1yd)+(28.09yd^{2})=145.75yd^{2}[/tex]
