Final answer:
The largest possible area that the second garden can have is 500,000 square feet
Step-by-step explanation:
To find the largest possible area of the second garden, we need to find the maximum value of the function g(n) = 5n² within the given constraints. The garden will be created inside a square with side lengths of 100 feet, so the maximum width of the garden (n) is 100 feet. Plugging in n = 100 into the function, we get g(100) = 5(100)² = 500,000 square feet.
Therefore, the largest possible area that the second garden can have is 500,000 square feet.