Answer:
7 trees will be planted along one block.
Therefore, option D is the correct choice.
Step-by-step explanation:
The length of the block in boskyville = 390 feet
So subtract 20 feet from the length of the block in boskyville.
i.e 390 feet - 20 feet = 370 feet
Thus, divide the 370 feet by 50 feet would bring us the total number of trees being planted along one block
i.e.
Trees along one block = 370 / 50
= 7 (Rounded to the whole number)
Thus, 7 trees will be planted along one block.
Therefore, option D is the correct choice.