The monthly rate is 3.6 inches per month.
So,
3.6 inches per months x 6.5 months = 23.4 inches
Answer: The tree grow by 23.4 inches.
Step-by-step explanation: Given that an oak tree grows at a rate of [tex]3\dfrac{3}{5}=\dfrac{18}{5}[/tex] inches per month.
We are to find the length by which the tree grow in [tex]6\dfrac{1}{2}=\dfrac{13}{2}[/tex] months.
We will be using the UNITARY method to solve the given problem.
In one month, the length of the tree grew is
[tex]\dfrac{18}{5}~\textup{inch}.[/tex]
Therefore, in [tex]\dfrac{13}{2}[/tex] months, the length of the tree grew is given by
[tex]\dfrac{18}{5}\times\dfrac{13}{2}=\dfrac{117}{5}=23.4~\textup{inches}.[/tex]
Thus, the tree grow by 23.4 inches.
