The area of a rectangle can be calculated using the following formula:

Where "l" is the length and "w" is the width.
In this case you know that:

Then, substituting values into the formula and evaluating, you get that Jake's patio area is:

If you double the area, this would be:

Knowing the above, let's check each option:
1. If you double the length only:

2. Adding 2 feet to the length only:
![undefined]()