Answer:
Step-by-step explanation:
Alright, lets get started.
Della bought a tree seeding that was
feet tall means
feet.
First year it grew
feet means it grew
feet.
It means after 1 year, the height of tree will be = 
After 2 years, the height of tree is = 5 feet
So, it grew in second year = 
So, it grew in second year = 
So, it grew in second year=
feet. : Answer
Hope it will help :)