Answer:
Third option given
Step-by-step explanation:
On a coordinate plane, a parabola opens to the right with a vertex at (0, 0).
use the following x values to plot the associated y values on the x-y plane:
If x = 0, then ![y=\sqrt{0} =0](https://tex.z-dn.net/?f=y%3D%5Csqrt%7B0%7D%20%20%3D0)
If x = 1, then ![y=\sqrt{1} =1](https://tex.z-dn.net/?f=y%3D%5Csqrt%7B1%7D%20%20%3D1)
If x = 4, then ![y=\sqrt{4} =2](https://tex.z-dn.net/?f=y%3D%5Csqrt%7B4%7D%20%20%3D2)
If x = 9, then ![y=\sqrt{9} =3](https://tex.z-dn.net/?f=y%3D%5Csqrt%7B9%7D%20%20%3D3)
Join the points and you will find a branch of a parabola opening to the right.
![\sf\dfrac{x}{100}+\dfrac{3}{100}=\dfrac{8}{100}](https://tex.z-dn.net/?f=%5Csf%5Cdfrac%7Bx%7D%7B100%7D%2B%5Cdfrac%7B3%7D%7B100%7D%3D%5Cdfrac%7B8%7D%7B100%7D)
Subtract 3/100 to both sides:
![\sf\dfrac{x}{100}=\dfrac{5}{100}](https://tex.z-dn.net/?f=%5Csf%5Cdfrac%7Bx%7D%7B100%7D%3D%5Cdfrac%7B5%7D%7B100%7D)
Cross multiply:
![\sf100x=500](https://tex.z-dn.net/?f=%5Csf100x%3D500)
Divide 100 to both sides:
![\sf~x=5](https://tex.z-dn.net/?f=%5Csf~x%3D5)
Or we could just multiply both sides of the equation by 100, to give us:
![\sf~x+3=8](https://tex.z-dn.net/?f=%5Csf~x%2B3%3D8)
Subtract 3 to both sides:
64 cubic feet is the answer you’re lookin for!
Using proportions, it is found that $147.8 billion was spent on television advertising in the previous year.
- $x, in billions, was spent on advertising expenditures on television last year.
- This year, the amount declined 4.1%, hence it is 100% - 4.1% = 95.9% of last year's amount, that is, 0.959x.
This year spending's is of 141.7 billion, hence, the equation is:
![0.959x = 141.7](https://tex.z-dn.net/?f=0.959x%20%3D%20141.7)
![x = \frac{141.7}{0.959}](https://tex.z-dn.net/?f=x%20%3D%20%5Cfrac%7B141.7%7D%7B0.959%7D)
![x = 147.8](https://tex.z-dn.net/?f=x%20%3D%20147.8)
$147.8 billion was spent on television advertising in the previous year.
To learn more about proportions, you can take a look at brainly.com/question/24372153