Step-by-step explanation:
20 x 399 x 5
= (20×5) × 399
= 100×399
= 39,900
The percentage rate of increase is 36.2% and the exponential function represent the growth.
<h3>What is an exponential function?</h3>
It is defined as the function that rapidly increases and the value of the exponential function is always a positive. It denotes with exponent 
where 'a' is a constant and a>1
We have exponential function:

If we compare with

If 1+r > 1
1.362 > 1
So the growth rate r is
1 + r = 1.362
r = 0.362
r = 0.362×100
r = 36.2%
Thus, the percentage rate of increase is 36.2% and the exponential function represent the growth.
Learn more about the exponential function here:
brainly.com/question/11487261
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To convert a percent to a decimal, you divide by 100.
60% = 0.60
If x is the unknown number, the word is means equal
84 = 0.60 * x
Divide both sides by 0.60
84/0.60 = (0.60/0.60)* x = x
140 = x
ABFE =10•5=50
BFGC = 5•5=25
EFGH = 10•5=50
<h3>2, 6, 10</h3>
Step-by-step explanation:
Tom = s
Nancy = r
s=r-2 = Tom=Nancy-2
This means that Tom has $2 less than Nancy as they stayed in the information they gave us. They want us to complete the graph.
Since Tom has $2 less than Nancy all we have to do is apply rule -2 to each number.
4-2=2
8-2=6
12-2=10
Therefore the numbers to add to the graph are 2, 6, and 10.