An apple farmer has determined that if he plants 100 trees per acre, he will get a yield of 50 bushels per tree. For every tree that he plants over...

An apple farmer has determined that if he plants 100 trees per acre, he will get a yield of 50 bushels per tree. For every tree that he plants over 100, the yield will drop by 2 bushels per tree. Let X be the number of trees over 100 that are planted per acre.