Answer:
The height of the tree is 21 ft
Step-by-step explanation:
we know that
A light post that is 9 feet tall that casts a shadow that is 6 feet long
so
by proportion
Find out the the height of the tree if a tree that casts a shadow that is 14 feet long
Let
x ----> the height of the tree

therefore
The height of the tree is 21 ft

The factorized form of the given equation is ~

Let's solve ~


Now, as we can see, an Identity is applied here ~
that is ;

So, let's use this identity in our next step, taking :

I can't figure out the answer to this one i'm really sorry but anytime!
thanks