Answer:
A model with 4 shaded sections and 6 unshaded sections.
A model with 40 shaded sections and 60 unshaded sections.
Step-by-step explanation:
Required:
Which models shows 40%
(a) 4 shaded and 6 unshaded
First, we calculate the total sections
![Total = 4 + 6](https://tex.z-dn.net/?f=Total%20%3D%204%20%2B%206)
![Total = 10](https://tex.z-dn.net/?f=Total%20%3D%2010)
The percentage of the shaded section is:
![Shaded = \frac{4}{10} * 100\%](https://tex.z-dn.net/?f=Shaded%20%3D%20%5Cfrac%7B4%7D%7B10%7D%20%2A%20100%5C%25)
![Shaded = 0.4 * 100\%](https://tex.z-dn.net/?f=Shaded%20%3D%200.4%20%2A%20100%5C%25)
![Shaded = 40\%](https://tex.z-dn.net/?f=Shaded%20%3D%2040%5C%25)
(b) 40 shaded and 60 unshaded
First, we calculate the total sections
![Total = 40 + 60](https://tex.z-dn.net/?f=Total%20%3D%2040%20%2B%2060)
![Total = 100](https://tex.z-dn.net/?f=Total%20%3D%20100)
The percentage of the shaded section is:
![Shaded = \frac{40}{100} * 100\%](https://tex.z-dn.net/?f=Shaded%20%3D%20%5Cfrac%7B40%7D%7B100%7D%20%2A%20100%5C%25)
![Shaded = 0.4 * 100\%](https://tex.z-dn.net/?f=Shaded%20%3D%200.4%20%2A%20100%5C%25)
![Shaded = 40\%](https://tex.z-dn.net/?f=Shaded%20%3D%2040%5C%25)
(c) 2 shaded and 8 unshaded
First, we calculate the total sections
![Total = 2 + 8](https://tex.z-dn.net/?f=Total%20%3D%202%20%2B%208)
![Total = 10](https://tex.z-dn.net/?f=Total%20%3D%2010)
The percentage of the shaded section is:
![Shaded = \frac{2}{10} * 100\%](https://tex.z-dn.net/?f=Shaded%20%3D%20%5Cfrac%7B2%7D%7B10%7D%20%2A%20100%5C%25)
![Shaded = 0.2 * 100\%](https://tex.z-dn.net/?f=Shaded%20%3D%200.2%20%2A%20100%5C%25)
![Shaded = 20\%](https://tex.z-dn.net/?f=Shaded%20%3D%2020%5C%25)
<em>Hence, (a) and (b) shows 40%</em>