Answer: 100$.
100% - 80% = 20%
20$ / 0.20(20%) =100$
Average rate of change of the function: 
Step-by-step explanation:
The average rate of change of a function f(x) can be calculated as:

where:
are the x-values of the interval taken into account to evaluate the rate of change of the function
are the values of the function at those points
In this problem, we have:

The function is
, so

So, the average rate of change in this interval is:

Learn more about rates of change:
brainly.com/question/4152194
brainly.com/question/12941985
#LearnwithBrainly
Answer:
{(5, –4), (–4, 5), (–5, 4), (4, –5)}
The area of a triangle is given by half the multiplication of base and height. Since you want the answer is squared centimeters, let's convert base and height in centimeters first:

Now we can do the computation:
