Part 1 (Area of the Garden)
In Plan A. the garden measures 9 ft by 12 ft.

In Plan B, the garden has a radius of 5 ft.

Part 2 (Area of the Deck)
Area of the Deck = Area of the outer shape-Area of the garden
Plan A

Plan B

Part 3
It costs $4.20 per square foot to install the deck:

Part 4
It costs $1.40 per square foot to install the garden:

Part 5
We calculate the total costs

We see that Plan B is less expensive by:
