Answer:270,000Step-by-step explanation:So, you have a number of people (15) that can stand comfortably within a certain area (5x8 ft = 40 sq feet). And you need to find out how many people can fit in the whole park area.First step is to find out how big the park is, in square feet, so we can then evaluate the number of people that we can fit in.You had the right number for calculating the area of the park:A = 400 yards x 200 yards = 1,200 feet x 600 feet = 720,000 sq feetNow, how many people can we fit in there? Let's use a simple cross-multiplication (x being the number of people fitting in the whole park, what we are looking for):[tex]\frac{x}{720 000} = \frac{15}{40}[/tex]By isolating x, we have x = (720,000 * 15) / 40 = 10,800,000 / 40 = 270,000So, the park could accommodate 270,000 people.That is of course if there are no trees, no benches, no kids playground or any other infrastructure in the park.