Answer:
3 Years.
Explanation:
4.1 feet = Starting Height.
4.1 + 14 feet = 18.1 feet.
18.1 + 14 feet = 32.1 feet
32.1 + 14 feet = 46.1
Count the number of times you added 14 to your number.
1, 2, 3.
It would take 3 years for the tree to have a height greater than 40 feet.