The equation are
1. V = 18,000(0.78)^t is exponential decay.
2. P = 4500(1.04)^t is exponential growth.
3.A = 7000(1.0575)^t is exponential growth.
4.P = 50(1/2)^t is exponential decay.
5.P = 45(2)^t is exponential growth.
6.A = 9000(0.9)^t is exponential decay.
Given that,
We have to find which equation is exponential growth and exponential decay.
Knowing that an exponential function takes the form where a represents the function's y=a.bˣ initial value a and b represents its exponential growth or exponential decay, B should be more than 1 for exponential growth and less than 1 for exponential decay.
b>1= exponential growth.
b<1= exponential decay.
Let's now examine each equation in turn to see which one represents exponential growth and which exponential decay.
1. [tex]V=18000(0.78)^{t}[/tex]
The initial values a and b in this option are 18000 and 0.78 respectively. Since 0.78 is smaller than 1, this equation describes exponential decay.
2.[tex]P=44500(1.04)^{t}[/tex]
Since 1.04 is obviously more than 1, and we can see that a = 4,500 and b equals 1, we may conclude that this equation represents exponential growth.
3.[tex]A=7000(1.0575)^{t}[/tex]
Since 1.0575 is clearly more than 1 and since a equals 7000 and b equals 1.0575, this equation clearly represents exponential growth.
4.[tex]P=50(1/2)^{t}[/tex]
Given that a = 50 and b equals 1, and that 0.5 is unmistakably less than 1, it is evident that this equation describes exponential decay.
5. [tex]P=45(2)^{t}[/tex]
Since a and b are equal to 45 and 2, respectively, and 2 is obviously greater than 1, this equation represents exponential growth.
6.[tex]A=9000(0.9)^{t}[/tex]
Since 0.9 is obviously less than 1 and that an equals 9000 and b equals 0.9, this equation represents exponential decay.
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