3(4*3)=12*9
12*9=108
3(4*3)=3*4=12
3*3=9
12*9
The first thing we are going to assume for this case is that the tree and the post are located in the same place.
From that place, both cast a shadow in the same direction.
We then have two similar triangles.
Therefore, we have the following relationship:

From here, we clear the value of x.
We have then:

Rewriting:
Answer:
the tree is 30 feet tall
Answer:
2520 decrease per year
Step-by-step explanation:
8.4% is also .084 so you multiply .084 by 30,000 and get 2520.