Answer:
[tex]\text{area} = 800 \text{ ft}^2[/tex]
Step-by-step explanation:
The formula for the area of the parallelogram is:
[tex]\text{area} = \text{base} \times \text{height}[/tex]
Base is 40 feet and height is 20 feet. You were also given side lengths, but you don't need that info to solve this.
Substitute formula with values:
[tex]\text{area} = 40 \text{ ft} \times 20 \text{ ft}\\\text{area} = 800 \text{ ft}^2[/tex]