commercial cherry grower estimates from past records that if 16 trees are planted per​ acre, then each tree will yield an average of 42 pounds of cherries per season.​ If, for each additional tree planted per acre​ (up to 22 additional​ trees), the average yield per tree is reduced by 1​ pound, how many trees should be planted per acre to obtain the maximum yield per​ acre? What is the maximum​ yield?
