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In a certain Pennsylvania apple orchard, each of the 50 apple trees produce 550 apples. As the farmer plants more apple trees, the other trees are more
crowed and produce less apples. The yield for each tree decreases by 3 apples for each tree planted. This is represented by the function f(x)=(50+x)(550-3x),
where x is the number of additional trees planted. How many more trees should be planted to optimize the total yield?
Select one:
a. 67
b. 35
C. 125