Maximizing the Total Yield A small orchard yields 25 bushels of fruit per tree when plante...

Maximizing the Total Yield A small orchard yields 25 bushels of fruit per tree when planted with 40 trees. Because of overcrowding, the yield per tree (for each tree in the orchard) is reduced by  bushel for each additional tree that is planted. How many trees should be planted to maximize the total yield of the orchard?