Answer:
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Step-by-step explanation:
Given
---x = 0, in 2012
-- x = 5, in 2017
Required
Select all possible equations
Because there is a reduction in the population, as time increases; the rate must be less than 1.
An exponential function is represented as:
![f(x) = ab^x](https://tex.z-dn.net/?f=f%28x%29%20%3D%20ab%5Ex)
Where
![b = rate](https://tex.z-dn.net/?f=b%20%3D%20rate)
rate > 1 in options (a) and (b) i.e. 1.03
This implies that (a) and (b) cannot be true
For option (c), we have:
![f(x) = 63000(0.97)^x](https://tex.z-dn.net/?f=f%28x%29%20%3D%2063000%280.97%29%5Ex)
Set x = 0
![f(0) = 63000(0.97)^0 = 63000*1=63000\\](https://tex.z-dn.net/?f=f%280%29%20%3D%2063000%280.97%29%5E0%20%3D%2063000%2A1%3D63000%5C%5C)
Set x = 5
![f(5) = 63000(0.97)^5 = 63000*0.8587=54098.1 \approx 54100](https://tex.z-dn.net/?f=f%285%29%20%3D%2063000%280.97%29%5E5%20%3D%2063000%2A0.8587%3D54098.1%20%5Capprox%2054100)
<em>This is true because the calculated values of f(0) and f(5) correspond to the given values</em>
For option (d), we have:
![f(x) = 52477(0.97)^x](https://tex.z-dn.net/?f=f%28x%29%20%3D%2052477%280.97%29%5Ex)
Set x = 0
![f(0) = 52477(0.97)^0 - 52477* 1 = 52477](https://tex.z-dn.net/?f=f%280%29%20%3D%2052477%280.97%29%5E0%20-%2052477%2A%201%20%3D%2052477)
<em>This is false because the calculated value of f(0) does not correspond to the given value</em>
For option (e), we have:
![f(x) = 63000(0.97)^\frac{1}{5x}](https://tex.z-dn.net/?f=f%28x%29%20%3D%2063000%280.97%29%5E%5Cfrac%7B1%7D%7B5x%7D)
Set x = 0
undefined
<em>This is false because the f(x) is not undefined at x = 0</em>
For option (f), we have:
![f(x) = 52477(0.97)^{5x](https://tex.z-dn.net/?f=f%28x%29%20%3D%2052477%280.97%29%5E%7B5x)
Set x = 0
![f(0) = 52477(0.97)^{5*0} = 52477(0.97)^0 =52477*1= 52477](https://tex.z-dn.net/?f=f%280%29%20%3D%2052477%280.97%29%5E%7B5%2A0%7D%20%3D%2052477%280.97%29%5E0%20%3D52477%2A1%3D%2052477)
<em>This is false because the calculated value of f(0) does not correspond to the given value</em>
<em>From the computations above, only (c) </em>
<em> is true</em>
Answer:
watermelon ..........................................
Answer:
you muliply first 9×7 and then carry the remainder to the other side and then 9×2 and add the remainder