Answer:
After 15 years, the area will be of 775.3 km²
Step-by-step explanation:
The equation for the area of the forest after t years has the following format.

In which A(0) is the initial area and r is the yearly decrease rate.
A certain forest covers an area of 2600 km2.
This means that 
Suppose that each year this area decreases by 7.75%.
This means that 
So


What will the area be like after 15 years?
This is 


After 15 years, the area will be of 775.3 km²
Answer:
<h3>The answer is 74 cm</h3>
Step-by-step explanation:
The area of a rectangle = length × width
Since we are finding the width
We have

From the question
area = 6216 cm²
length = 84 cm
The width is

We have the final answer as
<h3>74 cm</h3>
Hope this helps you
I think this mean that in whatever equation you have, w must be representing -3. Not sure though :)
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