Answer:
206.9 square feet
Explanation:
We know that the amount of wood purchased has to equal the area of the deck minus the area of the hot tub.
Lets find the area of the hot tub.

Lets make pi equal to 3.141

Now lets find the area of the deck.

Subtract the area of the hot tub from the deck.

$540, you just multiply $50 x those 6 months =$300 then you multiply $40 x those other 6 months and u get $240 and then you add the 240 and the 300 and get 540
I believe it is Ben Nevis