Answer : The oak tree grows in
will be, 42.9 inches
Step-by-step explanation :
As we are given that,
The rate of oak tree grows =
. Now we have to calculate the height of oak tree in 
As per question,
The oak tree grows in 1 month = 
The oak tree grows in
months = 
= 42.9 inches
Therefore, the oak tree grows in
will be, 42.9 inches