How do I do this? A squash patch currently has 120 pounds of butternut squash. For each additional day in the patch, the amount of butternut squash increases by 6 pounds. If the price of butternut squash is currently 80 cents per pound, but decreases by 2 cents each day, how long should the butternut squash grow to maximize the profit?

Jack has a rectangular piece of land, the area of which is represented by a1 = 9.5l. his brother has a different rectangular piece of land, the area of which is represented by a2 = l(14 − l). let a represent the area in square meters and l represent the length in meters of the pieces of land. the two equations plotted on a graph meet at a point as shown in the image