Answer:

Step-by-step explanation:
Plug in points to equation

Subtract to get 
Step 1: 25% = 1/4 Turn the percent into a fraction
Step 2: 10.99 x 1/4 Multiply the discount
Step 3: 2.75 Get the amount that will be discounted
Step 4: 10.99 - 2.75 Subtract the total cost by the discount.
Answer: $8.24
Assuming that is a square pyramid
that is the square base+4 triangles
that is
side^2+4(1/2bh)
where b=side=14in
and h=height=13in
surface area=14^2+4(1/2)(14)(13)
SA=196+(2)(182)
SA=196+364
SA=560 square inches