An orchardist has one grove of 50 orange trees. Each tree produces 800 oranges. The orchardist knows from experience that each addition tree planted in the grove will reduce the output of each tree by .10 oranges. How many tree should the orchardist plant in the grove in order to maximize the total population? I am just wondering if there are any good tips on finding an equation for this question. I want to improve my problem solving skills but I can't understand how the answer was found (800-(x-50)x) or something similar (I don't have my solutions on me.) I don't need to know how to solve it. Thanks.